Add the ability to recover deleted formulae

Closes #21
Update ruby-prof dependency to 0.13.1
Update newrelic_rpm to 3.7.1.180
Update uglifier dependency to 2.4.0
Update mongoid dependency to 3.1.6
Update RSpec dependencies to 2.14
Update diff-lcs dependency to 1.2.5
Update rake dependency to 10.1.1
Update tzinfo dependency to 0.3.38
Update tilt dependency to 1.4.1
Update i18n dependency to 0.6.9
Update hike dependency to 1.2.3
Update json dependency to 1.8.1
Update multi_json dependency to 1.8.2
Update compass-rails dependency to 1.1.2
Update chunky_png dependency to 1.2.9
Update fssm dependency to 0.2.10
Update sass dependency to 3.2.13
Update jquery-rails dependency 3.0.4
Use `git log -M` instead of `git log —-find-renames`

This is compatible with Git 1.7 installed on Heroku instances.