diff --git a/autoload/neosnippet/util.vim b/autoload/neosnippet/util.vim
index 00ba8ee..9b3de8c 100644
--- a/autoload/neosnippet/util.vim
+++ b/autoload/neosnippet/util.vim
@@ -1,7 +1,7 @@
 "=============================================================================
 " FILE: util.vim
 " AUTHOR: Shougo Matsushita <Shougo.Matsu@gmail.com>
-" Last Modified: 13 Nov 2013.
+" Last Modified: 15 Feb 2014.
 " License: MIT license  {{{
 "     Permission is hereby granted, free of charge, to any person obtaining
 "     a copy of this software and associated documentation files (the
@@ -28,36 +28,57 @@ let s:save_cpo = &cpo
 set cpo&vim
 
 let s:V = vital#of('neosnippet')
+function! neosnippet#util#get_vital() "{{{
+  return s:V
+endfunction"}}}
+function! s:get_prelude() "{{{
+  if !exists('s:Prelude')
+    let s:Prelude = neosnippet#util#get_vital().import('Prelude')
+  endif
+  return s:Prelude
+endfunction"}}}
+function! s:get_list() "{{{
+  if !exists('s:List')
+    let s:List = neosnippet#util#get_vital().import('Data.List')
+  endif
+  return s:List
+endfunction"}}}
+function! s:get_process() "{{{
+  if !exists('s:Process')
+    let s:Process = neosnippet#util#get_vital().import('Process')
+  endif
+  return s:Process
+endfunction"}}}
 
 function! neosnippet#util#substitute_path_separator(...) "{{{
-  return call(s:V.substitute_path_separator, a:000)
+  return call(s:get_prelude().substitute_path_separator, a:000)
 endfunction"}}}
 function! neosnippet#util#system(...) "{{{
-  return call(s:V.system, a:000)
+  return call(s:get_process().system, a:000)
 endfunction"}}}
 function! neosnippet#util#has_vimproc(...) "{{{
-  return call(s:V.has_vimproc, a:000)
+  return call(s:get_process().has_vimproc, a:000)
 endfunction"}}}
 function! neosnippet#util#is_windows(...) "{{{
-  return call(s:V.is_windows, a:000)
+  return call(s:get_prelude().is_windows, a:000)
 endfunction"}}}
 function! neosnippet#util#is_mac(...) "{{{
-  return call(s:V.is_mac, a:000)
+  return call(s:get_prelude().is_mac, a:000)
 endfunction"}}}
 function! neosnippet#util#get_last_status(...) "{{{
-  return call(s:V.get_last_status, a:000)
+  return call(s:get_process().get_last_status, a:000)
 endfunction"}}}
 function! neosnippet#util#escape_pattern(...) "{{{
-  return call(s:V.escape_pattern, a:000)
+  return call(s:get_prelude().escape_pattern, a:000)
 endfunction"}}}
 function! neosnippet#util#iconv(...) "{{{
-  return call(s:V.iconv, a:000)
+  return call(s:get_process().iconv, a:000)
 endfunction"}}}
 function! neosnippet#util#truncate(...) "{{{
-  return call(s:V.truncate, a:000)
+  return call(s:get_prelude().truncate, a:000)
 endfunction"}}}
 function! neosnippet#util#strwidthpart(...) "{{{
-  return call(s:V.strwidthpart, a:000)
+  return call(s:get_prelude().strwidthpart, a:000)
 endfunction"}}}
 
 function! neosnippet#util#expand(path) "{{{
@@ -70,7 +91,7 @@ function! neosnippet#util#set_default(var, val, ...)  "{{{
   endif
 endfunction"}}}
 function! neosnippet#util#set_dictionary_helper(...) "{{{
-  return call(s:V.set_dictionary_helper, a:000)
+  return call(s:get_prelude().set_dictionary_helper, a:000)
 endfunction"}}}
 
 function! neosnippet#util#get_cur_text() "{{{
diff --git a/autoload/vital/_9bfba96.vim b/autoload/vital/_neosnippet.vim
similarity index 99%
rename from autoload/vital/_9bfba96.vim
rename to autoload/vital/_neosnippet.vim
index 3ba9dc9..6a0aac3 100644
--- a/autoload/vital/_9bfba96.vim
+++ b/autoload/vital/_neosnippet.vim
@@ -199,5 +199,5 @@ function! s:_redir(cmd)
 endfunction
 
 function! vital#{s:self_version}#new()
-  return s:_import('').load(['Prelude', ''])
+  return s:_import('')
 endfunction
diff --git a/autoload/vital/_9bfba96/Data/List.vim b/autoload/vital/_neosnippet/Data/List.vim
similarity index 89%
rename from autoload/vital/_9bfba96/Data/List.vim
rename to autoload/vital/_neosnippet/Data/List.vim
index 226f55a..cdbd49b 100644
--- a/autoload/vital/_9bfba96/Data/List.vim
+++ b/autoload/vital/_neosnippet/Data/List.vim
@@ -24,18 +24,22 @@ function! s:cons(x, xs)
   return [a:x] + a:xs
 endfunction
 
-" TODO spec
 function! s:conj(xs, x)
   return a:xs + [a:x]
 endfunction
 
 " Removes duplicates from a list.
-function! s:uniq(list, ...)
-  let list = a:0 ? map(copy(a:list), printf('[v:val, %s]', a:1)) : copy(a:list)
+function! s:uniq(list)
+  return s:uniq_by(a:list, 'v:val')
+endfunction
+
+" Removes duplicates from a list.
+function! s:uniq_by(list, f)
+  let list = map(copy(a:list), printf('[v:val, %s]', a:f))
   let i = 0
   let seen = {}
   while i < len(list)
-    let key = string(a:0 ? list[i][1] : list[i])
+    let key = string(list[i][1])
     if has_key(seen, key)
       call remove(list, i)
     else
@@ -43,7 +47,7 @@ function! s:uniq(list, ...)
       let i += 1
     endif
   endwhile
-  return a:0 ? map(list, 'v:val[0]') : list
+  return map(list, 'v:val[0]')
 endfunction
 
 function! s:clear(list)
@@ -56,30 +60,29 @@ endfunction
 " Concatenates a list of lists.
 " XXX: Should we verify the input?
 function! s:concat(list)
-  let list = []
+  let memo = []
   for Value in a:list
-    let list += Value
+    let memo += Value
   endfor
-  return list
+  return memo
 endfunction
 
-" Flattens a list.
+" Take each elements from lists to a new list.
 function! s:flatten(list, ...)
   let limit = a:0 > 0 ? a:1 : -1
-  let list = []
+  let memo = []
   if limit == 0
     return a:list
   endif
   let limit -= 1
   for Value in a:list
-    if type(Value) == type([])
-      let list += s:flatten(Value, limit)
-    else
-      call add(list, Value)
-    endif
+    let memo +=
+          \ type(Value) == type([]) ?
+          \   s:flatten(Value, limit) :
+          \   [Value]
     unlet! Value
   endfor
-  return list
+  return memo
 endfunction
 
 " Sorts a list with expression to compare each two values.
@@ -105,11 +108,6 @@ function! s:sort_by(list, expr)
   \      'a:a[1] ==# a:b[1] ? 0 : a:a[1] ># a:b[1] ? 1 : -1'), 'v:val[0]')
 endfunction
 
-function! s:max(list, expr)
-  echoerr 'Data.List.max() is obsolete. Use its max_by() instead.'
-  return s:max_by(a:list, a:expr)
-endfunction
-
 " Returns a maximum value in {list} through given {expr}.
 " Returns 0 if {list} is empty.
 " v:val is used in {expr}
@@ -121,11 +119,6 @@ function! s:max_by(list, expr)
   return a:list[index(list, max(list))]
 endfunction
 
-function! s:min(list, expr)
-  echoerr 'Data.List.min() is obsolete. Use its min_by() instead.'
-  return s:min_by(a:list, a:expr)
-endfunction
-
 " Returns a minimum value in {list} through given {expr}.
 " Returns 0 if {list} is empty.
 " v:val is used in {expr}
diff --git a/autoload/vital/_9bfba96/Prelude.vim b/autoload/vital/_neosnippet/Prelude.vim
similarity index 80%
rename from autoload/vital/_9bfba96/Prelude.vim
rename to autoload/vital/_neosnippet/Prelude.vim
index 7c1425f..9a076bc 100644
--- a/autoload/vital/_9bfba96/Prelude.vim
+++ b/autoload/vital/_neosnippet/Prelude.vim
@@ -49,11 +49,6 @@ function! s:is_numeric(Value)
 endfunction
 
 " Number
-function! s:is_integer(Value)
-  echoerr 'Prelude.is_integer() is obsolete. Use its is_number() instead; they are equivalent.'
-  return s:is_number(a:Value)
-endfunction
-
 function! s:is_number(Value)
   return type(a:Value) ==# s:__TYPE_NUMBER
 endfunction
@@ -220,7 +215,14 @@ function! s:is_unix()
   return s:is_unix
 endfunction
 
+function! s:_deprecated(fname, newname)
+  echomsg printf("Vital.Prelude.%s is deprecated! Please use %s instead.",
+        \ a:fname, a:newname)
+endfunction
+
 function! s:print_error(message)
+  call s:_deprecated('print_error', 'Vital.Vim.Message.error')
+
   echohl ErrorMsg
   for m in split(a:message, "\n")
     echomsg m
@@ -240,47 +242,32 @@ function! s:escape_pattern(str)
   return escape(a:str, '~"\.^$[]*')
 endfunction
 
-" iconv() wrapper for safety.
-function! s:iconv(expr, from, to)
-  if a:from == '' || a:to == '' || a:from ==? a:to
-    return a:expr
-  endif
-  let result = iconv(a:expr, a:from, a:to)
-  return result != '' ? result : a:expr
-endfunction
-
-" Like builtin getchar() but returns string always.
 function! s:getchar(...)
   let c = call('getchar', a:000)
   return type(c) == type(0) ? nr2char(c) : c
 endfunction
 
-" Like builtin getchar() but returns string always.
-" and do inputsave()/inputrestore() before/after getchar().
 function! s:getchar_safe(...)
   let c = s:input_helper('getchar', a:000)
   return type(c) == type("") ? c : nr2char(c)
 endfunction
 
-" Like builtin getchar() but
-" do inputsave()/inputrestore() before/after input().
 function! s:input_safe(...)
-    return s:input_helper('input', a:000)
+  return s:input_helper('input', a:000)
 endfunction
 
-" Do inputsave()/inputrestore() before/after calling a:funcname.
 function! s:input_helper(funcname, args)
-    let success = 0
-    if inputsave() !=# success
-        throw 'inputsave() failed'
+  let success = 0
+  if inputsave() !=# success
+    throw 'inputsave() failed'
+  endif
+  try
+    return call(a:funcname, a:args)
+  finally
+    if inputrestore() !=# success
+      throw 'inputrestore() failed'
     endif
-    try
-        return call(a:funcname, a:args)
-    finally
-        if inputrestore() !=# success
-            throw 'inputrestore() failed'
-        endif
-    endtry
+  endtry
 endfunction
 
 function! s:set_default(var, val)
@@ -380,8 +367,9 @@ function! s:path2project_directory(path, ...)
 
   " Search project file.
   if directory == ''
-    for d in ['build.xml', 'prj.el', '.project', 'pom.xml',
-          \ 'Makefile', 'configure', 'Rakefile', 'NAnt.build', 'tags', 'gtags']
+    for d in ['build.xml', 'prj.el', '.project', 'pom.xml', 'package.json',
+          \ 'Makefile', 'configure', 'Rakefile', 'NAnt.build',
+          \ 'P4CONFIG', 'tags', 'gtags']
       let d = findfile(d, s:escape_file_searching(search_directory) . ';')
       if d != ''
         let directory = fnamemodify(d, ':p:h')
@@ -406,47 +394,6 @@ function! s:path2project_directory(path, ...)
   return s:substitute_path_separator(directory)
 endfunction
 
-" Check vimproc.
-function! s:has_vimproc()
-  if !exists('s:exists_vimproc')
-    try
-      call vimproc#version()
-      let s:exists_vimproc = 1
-    catch
-      let s:exists_vimproc = 0
-    endtry
-  endif
-  return s:exists_vimproc
-endfunction
-
-function! s:system(str, ...)
-  let command = a:str
-  let input = a:0 >= 1 ? a:1 : ''
-  let command = s:iconv(command, &encoding, 'char')
-  let input = s:iconv(input, &encoding, 'char')
-
-  if a:0 == 0
-    let output = s:has_vimproc() ?
-          \ vimproc#system(command) : system(command)
-  elseif a:0 == 1
-    let output = s:has_vimproc() ?
-          \ vimproc#system(command, input) : system(command, input)
-  else
-    " ignores 3rd argument unless you have vimproc.
-    let output = s:has_vimproc() ?
-          \ vimproc#system(command, input, a:2) : system(command, input)
-  endif
-
-  let output = s:iconv(output, 'char', &encoding)
-
-  return output
-endfunction
-
-function! s:get_last_status()
-  return s:has_vimproc() ?
-        \ vimproc#get_last_status() : v:shell_error
-endfunction
-
 let &cpo = s:save_cpo
 unlet s:save_cpo
 
diff --git a/autoload/vital/_neosnippet/Process.vim b/autoload/vital/_neosnippet/Process.vim
new file mode 100644
index 0000000..f2dc640
--- /dev/null
+++ b/autoload/vital/_neosnippet/Process.vim
@@ -0,0 +1,154 @@
+" TODO: move all comments to doc file.
+"
+"
+" FIXME: This module name should be Vital.System ?
+" But the name has been already taken.
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+
+" FIXME: Unfortunately, can't use s:_vital_loaded() for this purpose.
+" Because these variables are used when this script file is loaded.
+let s:is_windows = has('win16') || has('win32') || has('win64') || has('win95')
+let s:is_unix = has('unix')
+
+
+" Execute program in the background from Vim.
+" Return an empty string always.
+"
+" If a:expr is a List, shellescape() each argument.
+" If a:expr is a String, the arguments are passed as-is.
+"
+" Windows:
+" Using :!start , execute program without via cmd.exe.
+" Spawning 'expr' with 'noshellslash'
+" keep special characters from unwanted expansion.
+" (see :help shellescape())
+"
+" Unix:
+" using :! , execute program in the background by shell.
+function! s:spawn(expr, ...)
+  if s:is_windows
+    let shellslash = &l:shellslash
+    setlocal noshellslash
+  endif
+  try
+    if type(a:expr) is type([])
+      let special = 1
+      let cmdline = join(map(a:expr, 'shellescape(v:val, special)'), ' ')
+    elseif type(a:expr) is type("")
+      let cmdline = a:expr
+      if a:0 && a:1
+        " for :! command
+        let cmdline = substitute(cmdline, '\([!%#]\|<[^<>]\+>\)', '\\\1', 'g')
+      endif
+    else
+      throw 'Process.spawn(): invalid argument (value type:'.type(a:expr).')'
+    endif
+    if s:is_windows
+      silent execute '!start' cmdline
+    else
+      silent execute '!' cmdline '&'
+    endif
+  finally
+    if s:is_windows
+      let &l:shellslash = shellslash
+    endif
+  endtry
+  return ''
+endfunction
+
+" iconv() wrapper for safety.
+function! s:iconv(expr, from, to)
+  if a:from == '' || a:to == '' || a:from ==? a:to
+    return a:expr
+  endif
+  let result = iconv(a:expr, a:from, a:to)
+  return result != '' ? result : a:expr
+endfunction
+
+" Check vimproc.
+function! s:has_vimproc()
+  if !exists('s:exists_vimproc')
+    try
+      call vimproc#version()
+      let s:exists_vimproc = 1
+    catch
+      let s:exists_vimproc = 0
+    endtry
+  endif
+  return s:exists_vimproc
+endfunction
+
+" * {command} [, {input} [, {timeout}]]
+" * {command} [, {dict}]
+"   {dict} = {
+"     use_vimproc: bool,
+"     input: string,
+"     timeout: bool,
+"   }
+function! s:system(str, ...)
+  if type(a:str) is type([])
+    let command = join(map(copy(a:str), 's:shellescape(v:val)'), ' ')
+  elseif type(a:str) is type("")
+    let command = a:str
+  else
+    throw 'Process.system(): invalid argument (value type:'.type(a:str).')'
+  endif
+  let command = s:iconv(command, &encoding, 'char')
+  let input = ''
+  let use_vimproc = s:has_vimproc()
+  let args = [command]
+  if a:0 ==# 1
+    if type(a:1) is type({})
+      if has_key(a:1, 'use_vimproc')
+        let use_vimproc = a:1.use_vimproc
+      endif
+      if has_key(a:1, 'input')
+        let args += [s:iconv(a:1.input, &encoding, 'char')]
+      endif
+      if use_vimproc && has_key(a:1, 'timeout')
+        " ignores timeout unless you have vimproc.
+        let args += [a:1.timeout]
+      endif
+    endif
+  elseif a:0 >= 2
+    let [input; rest] = a:000
+    let input = s:iconv(a:1, &encoding, 'char')
+    let args += [input] + rest
+  endif
+
+  if use_vimproc
+    " vimproc's parser seems to treat # as a comment
+    let args[0] = escape(args[0], '#')
+    let funcname = 'vimproc#system'
+  else
+    let funcname = 'system'
+  endif
+  let output = call(funcname, args)
+  let output = s:iconv(output, 'char', &encoding)
+
+  return output
+endfunction
+
+function! s:get_last_status()
+  return s:has_vimproc() ?
+        \ vimproc#get_last_status() : v:shell_error
+endfunction
+
+if s:is_windows
+  function! s:shellescape(command)
+    return substitute(a:command, '[&()[\]{}^=;!''+,`~]', '^\0', 'g')
+  endfunction
+else
+  function! s:shellescape(...)
+    return call('shellescape', a:000)
+  endfunction
+endif
+
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim:set et ts=2 sts=2 sw=2 tw=0:
diff --git a/autoload/vital/neosnippet.vital b/autoload/vital/neosnippet.vital
index d4022aa..a63048f 100644
--- a/autoload/vital/neosnippet.vital
+++ b/autoload/vital/neosnippet.vital
@@ -1,3 +1,6 @@
-9bfba96
+neosnippet
+450727f
 
+Prelude
 Data.List
+Process