Add `squash-whitespace` bin script

Squashes extra whitespace between columns.

If you `grep` a large amount of columned text you will often end up with
extra unwanted space between the columns. Add this to your pipeline to
squash space.
Add `git-author` bin script
Show current git author in prompt if different from .gitconfig
Remove Brewfile

I've never really used this so far. Maybe next time I set up a Mac I'll
give it a go. Also, it looks as if the file might change at some point.

Deprecation warning:

    Warning: brew bundle is unsupported and will be replaced with
    another, incompatible version at some point.
    Please feel free volunteer to support it in a tap.
Add `glr` alias to show 10 most recent commits
Add `shorten` bin script for on.odin.bz
Add @garybernhardt's `selecta` with Zsh keybind
Add `catacomb` script
Add `twitter-whois` script
Add @garybernhardt's `field` script

For pulling out fields with `awk`.

Example:

    $ echo foo bar baz | field 2
    bar
Add @garybernhardt's `run-command-on-git-revisions` script
Add @pengwynn's `git-pr` and `mx` scripts
Add @hackling's vim-surround config
Add clear_colors colorscheme