Revision 435411

Update to upstream version 2.2.0

Detailed log:
- New option to prefer embedded image metadata over video content (command line
  argument: -m)
- Fixed 'Resource temporarily unavailable' errors when using ffmpeg < 3.0
- Restored deinterlace functionality using the libavfilter library (additional
  ffmpeg dependency)
- Additional video mime types added to the thumbnailer file
- Take rotation metadata into account when generating thumbnails

PR:		216648
Submitted by:	stl@ossuary.net
Approved by:	clutton@zoho.com (maintainer)
MFH:		2017Q1