BRender PIX image decoder

Further enhancements by Vittorio Giovara and Paul B Mahol.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
fate: add BRender PIX tests
lavc: restore copy_block{4,16} functions

They were removed in 9e31729d692f1e721b7ed1a3a0f51b68c064d68f.
PAF demuxer and decoder

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
fate: add PAF audio and video tests

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
xbm: use av_frame_free on close
X-Bitmap decoder
fate: add XBM tests
bmp: add a standalone parser

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
fate: add a bmpparser test
cmdutils: Mark exit_program as av_noreturn
movenc: Add dvd subtitle support

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
vp8: K&R formatting cosmetics

Signed-off-by: Diego Biurrun <diego@biurrun.de>