External subtitle partial
Merge remote-tracking branch 'upstream/master'

Conflicts:
	MediaBrowser.Theater.DirectShow/DirectShowPlayer.cs
	MediaBrowser.Theater.DirectShow/InternalDirectShowPlayer.cs
Fix Merge Typos
fixed #52 - Support external subtitles, final
Merge pull request #179 from shaunarundell/master

fixed #52 - Support external subtitles, final