Added vim-commentary and updarted the plugins.

commentary:
Comment stuff out.  Use `gcc` to comment out a line (takes a count),
`gc` to comment out the target of a motion (for example, `gcap` to
comment out a paragraph), and `gc` in visual mode to comment out the
selection.  That's it.

sources_non_forked/syntastic/syntax_checkers/javascript/jscs.vim

@@ -17,9 +17,6 @@ let g:loaded_syntastic_javascript_jscs_checker = 1
 let s:save_cpo = &cpo
 set cpo&vim
 
-" we borrow SyntaxCheckers_java_checkstyle_Preprocess() from java/checkstyle
-runtime! syntax_checkers/java/*.vim
-
 function! SyntaxCheckers_javascript_jscs_GetLocList() dict
     let makeprg = self.makeprgBuild({ 'args_after': '--no-colors --reporter checkstyle' })
     let errorformat = '%f:%t:%l:%c:%m'
@@ -27,9 +24,9 @@ function! SyntaxCheckers_javascript_jscs_GetLocList() dict
         \ 'makeprg': makeprg,
         \ 'errorformat': errorformat,
         \ 'subtype': 'Style',
-        \ 'preprocess': 'SyntaxCheckers_java_checkstyle_Preprocess',
+        \ 'preprocess': 'checkstyle',
         \ 'postprocess': ['sort'],
-        \ 'returns': [0] })
+        \ 'returns': [0, 2] })
 endfunction
 
 call g:SyntasticRegistry.CreateAndRegisterChecker({

sources_non_forked/syntastic/syntax_checkers/javascript/jshint.vim

@@ -47,7 +47,8 @@ function! SyntaxCheckers_javascript_jshint_GetLocList() dict
     return SyntasticMake({
         \ 'makeprg': makeprg,
         \ 'errorformat': errorformat,
-        \ 'defaults': {'bufnr': bufnr('')} })
+        \ 'defaults': {'bufnr': bufnr('')},
+        \ 'returns': [0, 2] })
 endfunction
 
 call g:SyntasticRegistry.CreateAndRegisterChecker({

sources_non_forked/syntastic/syntax_checkers/javascript/jsxhint.vim

@@ -0,0 +1,51 @@
+"============================================================================
+"File:        jsxhint.vim
+"Description: Javascript syntax checker - using jsxhint
+"Maintainer:  Thomas Boyt <me@thomasboyt.com>
+"License:     This program is free software. It comes without any warranty,
+"             to the extent permitted by applicable law. You can redistribute
+"             it and/or modify it under the terms of the Do What The Fuck You
+"             Want To Public License, Version 2, as published by Sam Hocevar.
+"             See http://sam.zoy.org/wtfpl/COPYING for more details.
+"============================================================================
+
+if exists('g:loaded_syntastic_javascript_jsxhint_checker')
+    finish
+endif
+let g:loaded_syntastic_javascript_jsxhint_checker = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! SyntaxCheckers_javascript_jsxhint_IsAvailable() dict
+    if !executable('jshint') || !syntastic#util#versionIsAtLeast(syntastic#util#getVersion('jshint --version'), [1, 1])
+        return 0
+    endif
+
+    let jsxhint_version = system(self.getExecEscaped() . ' --version')
+    return
+        \ v:shell_error == 0 &&
+        \ jsxhint_version =~# '\m^JSXHint\>' &&
+        \ syntastic#util#versionIsAtLeast(syntastic#util#parseVersion(jsxhint_version), [0, 4, 1])
+endfunction
+
+function! SyntaxCheckers_javascript_jsxhint_GetLocList() dict
+    let makeprg = self.makeprgBuild({
+        \ 'args_after': '--verbose' })
+
+    let errorformat = '%A%f: line %l\, col %v\, %m \(%t%*\d\)'
+
+    return SyntasticMake({
+        \ 'makeprg': makeprg,
+        \ 'errorformat': errorformat,
+        \ 'defaults': {'bufnr': bufnr('')} })
+endfunction
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'javascript',
+    \ 'name': 'jsxhint'})
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim: set et sts=4 sw=4: