VLC Player fixes and optimizations

Some fixes and optimizations in VLC Player.
Updated changelog
Official release of 3.6.0 for Windows and Linux
Formatting
Fix FFmpeg Thumbnal AR

Fix aspect ratio of thumbnails generated by FFmpeg, just like MPlayer
does (fitting the thumb in a 320x180 rectangle with black padding).
Updated changelog
Bumped version to 3.6.1
Enabled automatic updating on Windows to 3.6.0
Fix FFmpeg subtitle convert

Added a stopProcess() at the end of FFmpeg subtitle SRT to ASS
converting process. Without this, a pipe is created and a timer keeps
messing up the buffer progress bar, showing 0 MB/XX MB intermittently.
We can see this happening both in GUI interface and trace log when
playing a video with on-the-fly conversion of SRT subtitle to ASS with
FFmpeg.
Update pom.xml with new Dependency link
Merge pull request #293 from Optimusprimeums/pom_update

Update pom.xml with new Dependency link
Merge pull request #291 from tdcosta100/fix-ffmpeg-subtitle-convert

Fix FFmpeg subtitle convert
Merge pull request #290 from tdcosta100/ffmpeg-thumbnail-ar-fix

Fix FFmpeg Thumbnail AR
Merge pull request #280 from tdcosta100/vlc-fixes-optimizations

VLC Player fixes and optimizations
Go back to using MP2 audio in 3.6.x
Updated changelog
Will add this in 4.0.0 instead of 3.6.x
[Build Option] Skip project.binaries download with 'mvn -Doffline'
Allow urls in local playlists + provide fallback item names
Accomodate relative urls in playlists