Add comments about some plugins and add syntax check for vim, zsh, sh, …

vimrc

@@ -218,16 +218,25 @@ Plugin 'ervandew/supertab'
 " REQUIREMENTS: See :h syntastic-intro
 Plugin 'scrooloose/syntastic'
 
+" Advanced auto-completion system
 Plugin 'Shougo/neocomplcache'
+
+" Make vim mor Puppet friendly
 Plugin 'rodjek/vim-puppet'
+
+" Auto alignment (for Puppet for example)
 Plugin 'godlygeek/tabular'
+
 Plugin 'bling/vim-airline'
 "Bundle 'edkolev/tmuxline.vim'
+
+" Give viual aid to navigate marks
 Plugin 'jacquesbh/vim-showmarks'
 
 " Furry finder (files, mru, …)
 Plugin 'kien/ctrlp.vim'
 
+" Undo history visualizer
 Plugin 'mbbill/undotree'
 
 " Autoclose (, ", …
@@ -330,8 +339,8 @@ map <F8> <Leader>cs
 
 " Won't work ...
 let g:syntastic_mode_map = { 'mode': 'active',
-                               \ 'active_filetypes': ['ruby', 'php'],
-                               \ 'passive_filetypes': ['puppet'] }
+                               \ 'active_filetypes': ['markdown', 'php', 'ruby', 'sh', 'zsh'],
+                               \ 'passive_filetypes': ['puppet', 'sql', 'vim'] }
 "let g:syntastic_puppet_checkers = ['puppet']
 let g:syntastic_puppet_checkers = ['puppetlint']