create clojure specific settings

updated vimrc to load clojure.vim settings if entering .clj buffer
added rainbow parentheses to clojure.vim
added vim-clojure-highlight to bundle
* it adds dynamic syntax highlighting
removed slimv from the bundle
* I learned it was redundant since I have vimfireplace installed
Merge pull request #35 from zachmokahn/update_clojure_settings

create clojure specific settings