Change theme to Molokai
Install Vim and MacVim with Python 3 support
Use WeeChat for IRC
Add PostgreSQL config for a nicer psql experience
Add new tmux settings

Most of these settings are related to two things:
    1. Make tmux key binds more like Vim keybindings
    2. Make Vim look nicer in tmux

Powerline is being installed through Pip so that the right status will
properly display inside tmux.