doc/APIchanges: fill in missing hashes and dates
doc/APIchanges: mark the release 10 branch point
wavenc: use codec descriptors to get the codec name

Also, return a proper error code.
avconv: set the "encoder" tag when transcoding
movenc: use the "encoder" metadata tag to write stsd Compressorname

This mirrors the demuxer behaviour and avoids accessing
AVCodecContext.codec, which should not be done in muxers.
Merge commit '33082af7560a18179b52734665ef66f812902d33'

* commit '33082af7560a18179b52734665ef66f812902d33':
  doc/APIchanges: fill in missing hashes and dates

Conflicts:
	doc/APIchanges

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '968a62a9d9e3a785ce1f79b80facfe09c6c14544'

* commit '968a62a9d9e3a785ce1f79b80facfe09c6c14544':
  doc/APIchanges: mark the release 10 branch point

Conflicts:
	doc/APIchanges

Not merged, as there was no such branch in ffmpeg

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'd246231e4714119faac6c7acd881d3b687bb8b11'

* commit 'd246231e4714119faac6c7acd881d3b687bb8b11':
  wavenc: use codec descriptors to get the codec name

Conflicts:
	libavformat/wavenc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '6656370b858329ca07a60a2de954d5e90daa0206'

* commit '6656370b858329ca07a60a2de954d5e90daa0206':
  avconv: set the "encoder" tag when transcoding

Conflicts:
	ffmpeg.c
	tests/ref/lavf/mkv
	tests/ref/seek/lavf-mkv

Merged-by: Michael Niedermayer <michaelni@gmx.at>
ffmpeg: Skip writing the version when -flags bitexact is used

Alternatively every fate test could be changed to pass both fflags and flags +bitexact

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '0ba5299a805e9ccaef1a757381fc2ada4d54b8a1'

* commit '0ba5299a805e9ccaef1a757381fc2ada4d54b8a1':
  movenc: use the "encoder" metadata tag to write stsd Compressorname

Conflicts:
	libavformat/movenc.c
	libavformat/movenc.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
ffmpeg: prefix encoder with "Lavc " in bitexact mode

This avoids misleading encoder names like "encoder = prores"

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>