Support for external subtitles in VLC engine (thanks, tdcosta100!)
Closes issue #119.
Closes issue #120.

Conflicts:
	CHANGELOG.txt
	src/main/java/net/pms/encoders/VLCVideo.java
Update VLC video
Merge pull request #103 from UniversalMediaServer/ffmpeg_subs

Change FFmpeg subtitles based on https://trac.ffmpeg.org/ticket/2067
Speed up timeseeking
Merge branch 'ffmpeg_subs_update' into Panasonic_subs