API changes, most recent first:
+2016-xx-xx - xxxxxxx - lavc 59.26.0 - vaapi.h
+ Deprecate struct vaapi_context and the vaapi.h installed header.
+ Callers should set AVCodecContext.hw_frames_ctx instead.
+
2016-07-20 - xxxxxxx - lavu 55.20.0 - cpu.h
Add AV_CPU_FLAG_SSSE3SLOW.