Add comment headers to ale_linters

ale_linters/javascript/eslint.vim

@@ -1,3 +1,6 @@
+" Author: w0rp <devw0rp@gmail.com>
+" Description: eslint for JavaScript files
+
 if exists('g:loaded_ale_linters_javascript_eslint')
     finish
 endif

ale_linters/javascript/jscs.vim

@@ -1,4 +1,5 @@
 " Author: Chris Kyrouac - https://github.com/fijshion
+" Description: jscs for JavaScript files
 
 if exists('g:loaded_ale_linters_javascript_jscs')
     finish

ale_linters/javascript/jshint.vim

@@ -1,4 +1,5 @@
 " Author: Chris Kyrouac - https://github.com/fijshion
+" Description: JSHint for Javascript files
 
 if exists('g:loaded_ale_linters_javascript_jshint')
     finish