API changes, most recent first:
+2015-xx-xx - xxxxxxx - lavf 56.20.0 - avio.h
+ Add avio_put_str16be.
+
+2015-xx-xx - xxxxxxx - lavu 54.14.0 - cpu.h
+ Add AV_CPU_FLAG_AVXSLOW.
+
+2015-xx-xx - xxxxxxx - lavc 56.23.0
+ Add av_vda_default_init2.
+
+2015-xx-xx - xxxxxxx - lavu 54.12.0
+ Add AV_LOG_TRACE for extremely verbose debugging.
+
+2015-xx-xx - xxxxxxx - lavu 54.11.0
+ Add av_small_strptime().
+
+2015-xx-xx - xxxxxxx - lavc 56.22.0
+ Add FF_PROFILE_DTS_EXPRESS.
+
+2015-xx-xx - xxxxxxx - lavu 54.10.0
+ Add AV_PIX_FMT_MMAL for MMAL hardware acceleration.
+
+2015-xx-xx - xxxxxxx - lavc 56.13
+ Add width, height, coded_width, coded_height and format to
+ AVCodecParserContext.
+
2015-xx-xx - xxxxxxx - lavu 54.9.0
Add AV_PIX_FMT_QSV for QSV hardware acceleration.