video- add script loader
video- mvp implementation for YouTube video support (working)
video- add provider->class mapping
video- show videos in lightbox UI, support for YouTube and IGN currently
video- lock script loader dep version, fix typo
video- Merge from master
add logger to MediaWiki.fetch
media component
video- base ooyala support
Merge branch 'master' into video
Merge branch 'master' into video
video- clean up typing and fix bug in isProviderOoyala check
video- fix test
better var name,
style fixes
lazymixin,
lazyload images with
remove sloth and lazyload

now we have bit more controll on images in page
copy just an img element
video- implement tracking for YouTube player and clean up tracking implementation a bit more
video- add test for VideoLoader
lazy -> visible mixin
some comments for meda light box
fixes for visible mixin