Update ruby version -> 2.1.0
Update capybara -> 2.2.0
Update gems: newrelic_rpm -> 3.7.1.182,

pg -> 0.17.1, rake -> 10.1.1, rspec-rails -> 2.14.1,
sass -> 3.2.13
Update gems: rails_serve_static_assets -> 0.0.2,

uglifier -> 2.4.0