Limit index key length when creating oembed caches
Refactor and reorder backbone app initialization, fixes hovercards

Also added cucumber feature for hovercards
bump unicorn
bump carrierwave
bump i18n-inflector
bump rails-i18n
bump twitter
bump omniauth-twitter
bump cucumber
bump guard
bump remotipart
bump addressable
bump fixture_builder
bump foreigner
bump webmock
bump bcrypt-ruby
bump font-awesome-rails
bump net-scp
bump asset_sync
bump faraday