Hawk's fork of Dotfriles

My fork of Dotfriles adds the following features:
 + Mac OS X support, including Homebrew for package management
 + SublimeText 2/3 support, including copying config files to the Correct Place on OS X and Linux
 + Ability to install packages from a list in `~/.dotfriles/packages.txt`

Please sanity-check my additions before merging :)
Yup, I just checked - this was moved into the `apt-install()` function, which downloads the sudo script automagically - see https://github.com/ArcticLight/dotfriles/pull/1/files#diff-f94ac08697f89be0cff98d5e7186c323R53