Remove gi alias.
Clean out old vim configs

In the interest of an easier-to-read, more concise set of vim configs, doing a
little summer cleaning.

Removing settings that:
1. Weren't getting used
2. Have been adopted upstream by thoughtbot
Remove abandoned prompt features
Waiting for neovim to support tmux-navigator

Neovim seems to block keystrokes that tmux-navigator uses as well as my comment
shortcut.
Add irbrc, use @mislav's pbcopy
lockup to lock machine
Clean up completion locations
Back to old rename
Hard tabs when editing snipMate snippets
Snippet bankruptcy: rebuild from scratch