Merge remote-tracking branch 'qatar/master'

* qatar/master:
  ARM: allow runtime masking of CPU features
  dsputil: remove unused functions
  mov: Treat keyframe indexes as 1-origin if starting at non-zero.
  mov: Take stps entries into consideration also about key_off.
  Remove lowres video decoding

Conflicts:
	ffmpeg.c
	ffplay.c
	libavcodec/arm/vp8dsp_init_arm.c
	libavcodec/libopenjpegdec.c
	libavcodec/mjpegdec.c
	libavcodec/mpegvideo.c
	libavcodec/utils.c
	libavformat/mov.c

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