update sass-rails gem to version 5.0.5
update rails to version 4.2.0
update jquery-rails to version 4.0.2
config/environments/production.rb

renamed config_static_assets to config_static_files for deprecation message
config/environments/production.rb

renamed config_static_assets to config_static_files for deprecation message and test_order to random
renamed config_static_assets to config_static_files for deprecation message
renamed deliver to deliver_now for deprecation warning