Fix for ytdl update

Fixed ytdl update & updates dependencies

Bugfix for webm videos

Release addressing a bug with ffmpeg and webm files for file probes.

0.6.1 stable release of 0.6

Addressing some bugs with playlist downloads, this is the first stable release.

0.6

Added: merge & audio extract progress info, overhauling the whole converter calls.
Changed: Files can now contain " \ and ` as these doesn't have to be escaped as of now.
Fixed: issue with the AAC/HQ downloads

Windows builds are non tested but should work now with the recent converter changes.