AVERROR_ defines are moved to avcodec.h as they are needed in there as well. Feel free to move that to avutil/common.h.
Bumped up avcodec/format version numbers as though it's binary compatible we will want to rebuild apps as error values changed.
Please from now on use return AVERROR(EFOO) instead of the ugly return -EFOO in your code.
This also removes the need for berrno.h.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@7965 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b