Update ruby to 1.9.3-p392
Update unicorn gem to 4.6.1
Update selenium-webdriver gem to 2.30.0
Update newrelic_rpm gem to 3.5.7.59
Update addressable gem to 2.3.3
Update better_errors gem to 0.7.0
Update guard-rspec gem to 2.4.1
Update quiet_assets gem to 1.0.2
Update riddle gem to 1.5.4
Update sass gem to 3.2.6