Merge commit 'e002e329'

* commit 'e002e329':
  Use the new aes/md5/sha/tree allocation functions
  avutil: Add functions for allocating opaque contexts for algorithms
  svq3: fix pointer type warning
  svq3: replace unsafe pointer casting with intreadwrite macros
  parseutils-test: various cleanups

Conflicts:
	doc/APIchanges
	libavcodec/svq3.c
	libavutil/parseutils.c
	libavutil/version.h

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