Add gitgutter plugin

vimrc

@@ -27,7 +27,6 @@ Plug 'Keithbsmiley/swift.vim'
 Plug 'majutsushi/tagbar'
 Plug 'ternjs/tern_for_vim'
 Plug 'xolox/vim-easytags'
-Plug 'tpope/vim-fugitive'
 Plug 'nathanaelkane/vim-indent-guides'
 Plug 'xolox/vim-misc'
 Plug 'Shougo/vimproc.vim', {'do' : 'make'}
@@ -41,6 +40,10 @@ Plug 'junegunn/fzf', { 'do': './install --bin' }
 Plug 'junegunn/fzf.vim'
 Plug 'sbdchd/neoformat'
 
+" scm
+Plug 'tpope/vim-fugitive'
+Plug 'airblade/vim-gitgutter'
+
 " local_vimrc
 Plug 'LucHermitte/lh-vim-lib'
 Plug 'LucHermitte/local_vimrc'