Create fastfood-mac theme with backup prompt

The right prompt on this Mac specific theme shows the time since the
last time machine backup and whether or not the backup drive is
currently mounted.
Update .zshrc for chruby integration

We need to have oh-my-zsh loaded before we source the chruby stuff.
Extract status from prompt to its own script

Running as an external script allows the backup status prompt to
change without starting a new shell.
Ignore timemachine backup time file

$HOME/.last_timemachine_backup holds the timestamp of when OSX Time
Machine last successfully completed.
Add script to output random Lebowski quotes

This script depends on the Lebowski API running under pow:
https://github.com/aackerman/lebowski-api
Switch zshrc fortune to random Lebowski quotes
Ignore postgres history file
Add bin/rug: search the local lebowski API

Usage:

    rug SEARCH             Return lines containing SEARCH.
    rug SEARCH --quotes    Return quotes containing SEARCH.

Examples:

    $ rug cable
    "He fixes the cable? —The Dude"

    $ rug cable --quotes
    "Hello. Nein dizbatcher says zere iss problem mit deine kable. —Uli Kunkel"
    "Shit, I know that guy. He's a nihilist. —The Dude"
    "And you recognize her, of course. —Maude Lebowski"
    "Za, okay, I bring mein toolz. —Uli Kunkel"
    "The story is ludicrous. —Maude Lebowski"
    "Mein nommen iss Karl.  Is hard to verk in zese clozes-- —Uli Kunkel"
    "Lord. You can imagine where it goes from here. —Maude Lebowski"
    "He fixes the cable? —The Dude"
Strip color codes from lebowski results
Add time machine disk management scripts