Vim: Fix improve whitespace trimming function (saves current cursor position)
Vim: Add git plugins back plus fugitive buffer delete function

Add:
 * vim-fugitive plugin
 * gitv plugin
Vim: Add RABL syntax plugin
Add additional ZSH aliases (git grep, bundle exec, jump)
Fix up Vim's CtrlP plugin to search root (of a project), add filters for ag

Fix:
 * CtrlP plugin to use CtrlPRoot search (to only search under the current
   project, thus not using MRU files from other directories)
 * agignore to filter out version control files (CtrlP uses ag for its search)