Made a default prefered leader key

Make a leader key to map to ","
The default is "\" and will affect all remaps I use with <leader>
Make <leader>u show Gundo. It's better undo navigation
Added Tabularize submodule
Put all autocommands into their own files
Added Javascript files specific expandtab and spaces
Made search display next match in a highlighted box
Added <leader>, and <leader><bar> as window splitting mapping
Added submodules for snippets

According to http://www.sitepoint.com/effective-rails-development-vim/