Enable the Accessibility API for ShiftIt.

Required for Mavericks support.
Resurrect Java.

We need it.
Consolidate Homebrew formulae into site.pp.

  - This is where all system tools should be installed.
  - No need to pin to tig 1.2: just install the latest.
  - Add useful tool 'jq'. http://stedolan.github.io/jq/
Install ehrenmurdick-git-pair using brew-gem.

This installs it as a system command, rather than within a particular
rbenv Ruby version.
Remove edgecase-git-pair.

This is a duplicate version that we used in some places.
Normally, we use ehrenmurdick-git-pair.