* commit 'c4bfa098072ba338d83555d6e2199f7e1e64ffff':
Add a WebP decoder
Conflicts:
Changelog
doc/general.texi
libavcodec/Makefile
libavcodec/avcodec.h
libavcodec/version.h
libavformat/img2.c
The previously existing webp decoder is disabled as the new
one supports lossless mode and alpha while the previous does not.
Merged-by: Michael Niedermayer <michaelni@gmx.at>