doc: Fit the graph in 80 cols

Some man pagers do not reflow the text/graphs on resize
and the graphs did not fit the traditional 80cols due
the pod2man excessive indent.
log: Support for 256color terminals

And provide extended coloring capabilities for debugging.
The default colors do not change in 256 more to keep
supporting people using Black on White, White on Black and
Solarized terminals.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
log: Remove undefined behaviour
log: Document AV_LOG_C usage

And move outside the wrong doxygen group.
log: Do not assume the TERM variable is always set
log: Unbreak windows support

Add the missing define.
mxf: Remove typo

Reported-By: Vittorio Giovara <vittorio.giovara@gmail.com>
isom: add 'm1v ' tag

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
isom: add 'flic' tag
isom: add some BOXX tags
riff: Add ITRK tag

Some players, like foobar2000 or modern versions of WMP, create WAV
files using the ITRK tag for track instead of IPRT
riff: add ISMP/timecode tag
riff: add SMV2 FourCC for H264

Sample-Id: smv2.avi
riff: add H264 from QNAP Systems
riff: Add V264 for H264 in CCTV recordings
riff: add FourCC for GeoVision cameras
riff: Support H.264 fourcc UMSV
riff: add "lsvm" FourCC for H263.
riff: add G264 to mpeg4, only decodes keyframes
riff: add DM4V FourCC