[cherry-pick] Added decoding of IOCOM's IG2 H.264 non-standard H.264 streams - payload type 107 - identified as H264_IOCOM.

Note: VIC will decode IOCOM's 'standard H.264' [RFC3984] (the checkbox in the
video properties of IG2 needs to be checked) with latest ffmpeg library (when
patched to allow for use of one reference frame - when num_ref_frames=0 in SPS).
IOCOM will decode VIC's H.264 streams.

- Source: cherry-pick 0d095ff from mpeg4 branch
[cherry-pick] Corrected MPEG4 entry

- Source: cherry-pick deca057 from mpeg4 branch
[cherry-pick] Updated for newer revisions

- Source: cherry-pick 9dda434 from mpeg4 branch
[cherry-pick] Reverted back to using ffpmeg's av_base64_decode() function

There were problems with UCL common base64 decode and small Base64 sequences.
Probably need to fix UCL common library implementation but this sorts out H.264
parameter set decode for now. Successfully tested with Apple's Quicktime Broadcaster.

- Source: cherry-pick 0a54058 from mpeg4 branch
[cherry-pick] Intial updates for compliation under mingw

- Source: cherry-pick 6e6f547 from mpeg4 branch

Conflicts:

	codec/ffmpeg_codec.cpp
[cherry-pick] remove win32/postproc/postprocess.h

- Source: cherry-pick 737b0fe from mpeg4 branch
[cherry-pick] Added a new win32/libpostproc/postprocess.h

- Source: cherry-pick 8474943 from mpeg4 branch
[cherry-pick] Moved to ffmpeg where it should be

- Source: cherry-pick b322b4f from mepg4 branch
[cherry-pick] fixed warning messages:
"warning: deprecated conversion from string constant to ‘char*’"

- Source: cherry-pick e930ed3 from mpeg4 branch

Conflicts:

	main.cpp
[cherry-pick] Changed printf() call to debug_msg().
Set default image size to CIF - will change if new size comes in.

- Source: cherry-pick 73aee13 from mpeg4 branch

Conflicts:

	codec/decoder-h264.cpp
[cherry-pick] Tweaked order of calls when checking for resize - probably best not to check unless the frame has decoded properly.

Added extern getpid() declaration for Windows

- Source: cherry-pick d24483d from mpeg4 branch

Conflicts:

	codec/ffmpeg_codec.cpp
[cherry-pick] Commented debug output during packet handling.
Converted to use debug_msg for final debug display.

- Source: cherry-pick ee5a574 from mpeg4 branch