2.0: - Changed seeking syntax to SEEK [value]

2.0: - Changed seeking syntax to SEEK [value]
     - Added ffmpeg filter capabilities with FILTER [str] syntax.
       To deinterlace pass FILTER yadif=0:-1 or to bob deinterlace (useful when scaling interlaced content) pass FILTER yadif=1:-1.
       See libavfilter documentation for additional filters.
       There is a bug when looping with filters that buffer frames which causes constant video underflow.
       ffmpeg_proudcer also needs some refactoring.

git-svn-id: https://casparcg.svn.sourceforge.net/svnroot/casparcg/server/branches/2.0.0.2@912 362d55ac-95cf-4e76-9f9a-cbaa9c17b72d