Close #542 - Add an option for disabling running locally installed executables by default

ale_linters/javascript/flow.vim

@@ -4,7 +4,7 @@
 
 call ale#Set('javascript_flow_executable', 'flow')
 call ale#Set('javascript_flow_use_home_config', 0)
-call ale#Set('javascript_flow_use_global', 0)
+call ale#Set('javascript_flow_use_global', get(g:, 'ale_use_global_executables', 0))
 
 function! ale_linters#javascript#flow#GetExecutable(buffer) abort
     let l:flow_config = ale#path#FindNearestFile(a:buffer, '.flowconfig')

ale_linters/javascript/jscs.vim

@@ -2,7 +2,7 @@
 " Description: jscs for JavaScript files
 
 call ale#Set('javascript_jscs_executable', 'jscs')
-call ale#Set('javascript_jscs_use_global', 0)
+call ale#Set('javascript_jscs_use_global', get(g:, 'ale_use_global_executables', 0))
 
 function! ale_linters#javascript#jscs#GetExecutable(buffer) abort
     return ale#node#FindExecutable(a:buffer, 'javascript_jscs', [

ale_linters/javascript/jshint.vim

@@ -2,7 +2,7 @@
 " Description: JSHint for Javascript files
 
 call ale#Set('javascript_jshint_executable', 'jshint')
-call ale#Set('javascript_jshint_use_global', 0)
+call ale#Set('javascript_jshint_use_global', get(g:, 'ale_use_global_executables', 0))
 
 function! ale_linters#javascript#jshint#GetExecutable(buffer) abort
     return ale#node#FindExecutable(a:buffer, 'javascript_jshint', [

ale_linters/javascript/standard.vim

@@ -2,7 +2,7 @@
 " Description: standardjs for JavaScript files
 
 call ale#Set('javascript_standard_executable', 'standard')
-call ale#Set('javascript_standard_use_global', 0)
+call ale#Set('javascript_standard_use_global', get(g:, 'ale_use_global_executables', 0))
 call ale#Set('javascript_standard_options', '')
 
 function! ale_linters#javascript#standard#GetExecutable(buffer) abort

ale_linters/javascript/xo.vim

@@ -2,7 +2,7 @@
 " Description: xo for JavaScript files
 
 call ale#Set('javascript_xo_executable', 'xo')
-call ale#Set('javascript_xo_use_global', 0)
+call ale#Set('javascript_xo_use_global', get(g:, 'ale_use_global_executables', 0))
 call ale#Set('javascript_xo_options', '')
 
 function! ale_linters#javascript#xo#GetExecutable(buffer) abort