add vim-less plugin (css less support)

vim/vimrc.bundles

@@ -86,6 +86,7 @@ Bundle 'tpope/vim-cucumber'
 Bundle 'quentindecock/vim-cucumber-align-pipes'
 Bundle 'kchmck/vim-coffee-script'
 Bundle 'mintplant/vim-literate-coffeescript'
+Bundle 'groenewege/vim-less'
 " }}}
 
 " }}}