Align chapter images to top
Merge branch 'master' of https://github.com/MediaBrowser/MediaBrowser
Merge branch 'master' of https://github.com/MediaBrowser/MediaBrowser
Merge branch 'master' of https://github.com/MediaBrowser/MediaBrowser
Merge branch 'master' of https://github.com/MediaBrowser/MediaBrowser
Merge pull request #784 from timhobbs/master

CSS update
add new playback checkin endpoints
Webm adjustments to cpu threads and quality
revert poster item css change
handle dlna browse requests
Merge pull request #785 from tikuf/master

Webm adjustments to cpu threads and quality
Merge pull request #786 from timhobbs/master

Chromecast updates
Merge pull request #787 from timhobbs/master

Video player CSS updates