* qatar/master:
  lavfi: autoinsert resample filter when necessary.
  lavfi: add lavr-based audio resampling filter.
  x86: vc1: drop MMX loop filter implementation, which uses MMX2 instructions.

Conflicts:
	configure
	doc/filters.texi
	libavcodec/x86/vc1dsp_mmx.c
	libavfilter/Makefile
	libavfilter/allfilters.c
	libavfilter/avfiltergraph.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>