2.0.

2.0.
       - Removed blending mode, levels, saturation, hue, brigthness. Required high gpu even when not in use which was not acceptable in 1080p5000.
         Probably re-added in the future to allow optional usage.
       - Changed from async ffmpeg to parallel_invoke with optional buffer in mixer stage.
       - Added fix for flv looping.
       - Reduced ffmpeg input buffer size.

git-svn-id: https://casparcg.svn.sourceforge.net/svnroot/casparcg/server/branches/2.0.0.2@1148 362d55ac-95cf-4e76-9f9a-cbaa9c17b72d