Merge remote-tracking branch 'qatar/master'

Merge remote-tracking branch 'qatar/master'

* qatar/master:
  avconv: print the codecs names in the stream mapping.
  avconv: move the avcodec_find_decoder() call to add_input_streams().
  Windows Media Image decoder (WMVP/WVP2)
  ac3enc: remove outdated TODO comment for apply_channel_coupling()

Conflicts:
	Changelog
	libavcodec/avcodec.h
	libavcodec/vc1dec.c
	libavcodec/version.h

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