* upgrade to ffmpeg 2.2
* add HEVC/libx265 encoding support (with API change patch)
* add fdk-aac library support (with libaacplus anti-clash patch)
* use latest vendor libraries
Merge remote-tracking branch 'pyke/master'

* pyke/master:
  * upgrade to ffmpeg 2.2
  * add HEVC/libx265 encoding support (with API change patch)
  * add fdk-aac library support (with libaacplus anti-clash patch)
  * use latest vendor libraries