Add packet-fps-change-detection for PVRClient
Merge pull request #8 from JoeKar/bug/pvr-hints.fps

Bug-Fix: Add packet-fps-change-detection for PVRClient (solves missing hints.fps*)
[aml] adjust video_rate tweaks and back off pts error correction
[aml] fixed compile warning
[aml] fixed, if mpeg2 video, check the NAL to find width,height,aspect and frame rate
[aml] sync to mainline AudioEngine
Merge remote-tracking branch 'upstream/master'