Update dependencies (gemnasium-dd99ea2340e4819bba6acabfd03d7ded1562008d)

Updating following dependencies:
airbrake: 3.1.15 => 4.0.0
jquery-rails: 3.1.0 => 3.1.1
less-rails: 2.4.2 => 2.5.0
mocha: 1.0.0 => 1.1.0
omniauth: 1.2.1 => 1.2.2
omniauth-github: 1.1.1 => 1.1.2
redis: 3.0.7 => 3.1.0
resque: 1.25.1 => 1.25.2
resque-retry: 1.0.0 => 1.2.1
resque_unit: 0.4.5 => 0.4.8
rest-client: 1.6.7 => 1.7.2
rvm-capistrano: 1.5.1 => 1.5.3
sqlite3: 1.3.8 => 1.3.9
uglifier: 2.4.0 => 2.5.1
unicorn: 4.8.2 => 4.8.3