YouTube videos can now be configured to be played with HTML5 (<iframe>) or Flash (by default).
Update test according YouTubeProvider.
YouTube video : add "wmode" parameter.
Merge pull request #398 from grizzlylab/master

YouTube video player is now HTML5 compliant (replace old Flash player).
Tweak translation files
Merge pull request #399 from grosenbaum/tweak_translations

Tweak translation files
Merge branch 'sonata/master'