[FFmpeg] version bump to n1.2 (rev e820e3a) - lib/ffmpeg

This commit now contains the original patches sub directory:
  patches 			- Org dir that contains applied xbmc custom patches.
  patches/README-patches	- New README file with info about xbmc patches.
  patches/obsolete-patches	- New dir with obsolete xbmc patches.
[FFmpeg] version bump to n1.2 (rev e820e3a) - xbmc files

lib/DllAvFormat.h
lib/Makefile.in
lib/ffmpeg/build_xbmc_win32.sh
project/Win32BuildSetup/BuildSetup.bat
project/Win32BuildSetup/buildmingwlibs.sh
tools/depends/native/gas-preprocessor-native/gas-preprocessor.pl
xbmc/DllPaths_win32.h
xbmc/cores/dvdplayer/DVDAudio.h
xbmc/cores/dvdplayer/DVDCodecs/DVDCodecs.h
xbmc/cores/dvdplayer/DVDCodecs/Video/DVDVideoCodecFFmpeg.cpp
xbmc/cores/dvdplayer/DVDCodecs/Video/DVDVideoCodecFFmpeg.h
xbmc/cores/dvdplayer/DVDCodecs/Video/DVDVideoCodecLibMpeg2.cpp
xbmc/cores/dvdplayer/DVDCodecs/Video/DXVA.cpp
xbmc/cores/dvdplayer/DVDDemuxers/DVDDemux.h
xbmc/cores/dvdplayer/DVDPlayerAudio.h
xbmc/cores/dvdplayer/DVDStreamInfo.h
[WIN32] fixed BuildSetup.bat: copy the pdb file to the build setup directory.

Since Jenkins is dependent of the "pdb" file, it is copied to the setup directory with the new name "XBMCSetup-%GIT_REV%-%target%.pdb"
Removed "dead" (commented out) line (// pic->age  = 256*256*256*64; // decrepated)
Merge pull request #2554 from FlyingRat/ffmpeg-n1.2

[FFmpeg] version bump to n1.2 (rev e820e3a)
Only override episode/season numbers if the file name has them
Merge pull request #2590 from ScudLee/Date-based_Nfo_fix

Only override episode/season numbers if the file name has them
encoder: signed vs unsigned warning
dvdplayer: sub_id in ffmpeg has been depreciated and doesn't work
gas-preprocessor/-arch switch, missed one in ceab8eb9b70f7af17850350cb3af9ce328ae5609