Vimrc Cleanup, Molokai Term Colors & Cabal Aliases

* Add aliases to zsh for Haskell's package management program, cabal.
* Add the bash completion module to zsh.
* Add command aliases to the vimrc for the SudoWrite command.
* Add vim completion to comments and pull completion targets from strings and comments.

* Modify Xresources to use Molokai-ish colors for Urxvt.

* Update oh-my-zsh.
* Update the README.
* Update the vim plugins.

* Clean up and reorganize the vimrc, removing unused keybindings and
  keybindings/settings related to removed plugins.

* Fix a bug preventing oh-my-zsh from upgrading properly.