+2017-03-31 - xxxxxxx - lavu 55.57.100 - spherical.h
+ Add av_spherical_projection_name().
+ Add av_spherical_from_name().
+
+2017-03-30 - xxxxxxx - lavu 55.53.100 / 55.27.0 - hwcontext.h
+ Add av_hwframe_map() and associated AV_HWFRAME_MAP_* flags.
+ Add av_hwframe_ctx_create_derived().
+
+2017-03-29 - bfdcdd6d82 - lavu 55.52.100 - avutil.h