Update coveralls dependency to 0.7.0
Update airbrake dependency to 3.1.14
Update mongoid dependency to 3.1.5
Update unicorn dependency to 4.6.3
Update kgio dependency to 2.8.1
Update raindrops dependency to 0.12.0
Update newrelic_rpm dependency to 3.6.7.159
Update rake dependency to 10.1.0
Update sass dependency to 3.2.12