Added Coveralls badge to README
Set HOMEBREW_BREW_FILE while importing
Symlink tap formulae into main repository

This is required for Formula.path to work.
Automatically clone or pull the main repository in #clone_or_pull
Updated to Rails 3.2.13
Lock Ruby version in Gemfile again

… and use a different Gemfile for Travis CI.
Updated dates
Finally added a LICENSE file
Updated newrelic_rpm dependency to 3.6.0.78
Adapted error handling to Homebrew's new errors
Updated multi_json dependency to 1.7.2
Migrated to Mongoid 3.1.2
Fixed Repository specs

This was broken in 3dcb68309beb66efcf7a0f5908b0a1c5ef89bb13.
Updated unicorn dependency to 4.6.2
Updated kgio dependency to 2.8.0
Updated tzinfo dependency to 0.3.37
Updated foreman dependency to 0.62.0
Updated coveralls dependency to 0.6.3
Removed debug output in Repository#clone_or_pull
Sandbox version methods from Homebrew's MacOS module