Merge remote-tracking branch 'qatar/master'

Merge remote-tracking branch 'qatar/master'

* qatar/master: (31 commits)
  audioconvert: add explanatory comments to channel_names array
  audioconvert: K&R whitespace cosmetics
  avconv: use correct index when selecting metadata to write to.
  avconv: fix inverted variable
  doc/avconv: document option types (input/output/per-stream/...)
  doc/avtools-common-opts: write a section about stream specifiers.
  doc/avconv: remove two pointless paragraphs.
  doc/avconv: document that global options should be specified first.
  doc/avconv: remove entries for nonexistent options
  doc/avconv: remove documentation for removed 'timestamp' option
  doc: cosmetics, rename fftools-common-opts to avtools-....
  avconv: move streamid_map to options context.
  avconv: extend -vf syntax
  avconv: move top_field_first to options context.
  avconv: move inter/intra matrix to options context.
  avconv: remove -psnr option.
  avconv: remove me_threshold option.
  avconv: move video_rc_override_string to options context.
  avconv: move frame pixel format to the options context.
  avconv: move frame aspect ratio to the options context.
  ...

Conflicts:
	avconv.c
	cmdutils_common_opts.h
	doc/avconv.texi

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