Merge mp3 support from Orphis' old FFMPEG code.

Conflicts:
	CMakeLists.txt
	Core/HLE/sceAudio.cpp
	Core/HLE/sceMp3.cpp
	Core/HLE/sceMpeg.cpp
Uncomment some unused stack-corrupting code from sceMp3Decode. Update ffmpeg.
Fix sceMp3 build without USE_FFMPEG
Fix crash in mp3 reading.
Merge pull request #1786 from unknownbrackets/mp3-support

Fix crash in mp3 reading
Get mp3 sample rate and channels from FFMPEG instead of trying to detect ourselves.
VERBOSE a log statement
Add a stream source filter project.
Add atrac3plus lib.
add atrac3plus support for sceAtrac
Remove the dependency on DirectShow SDK.
Allow changing of MAX_RECENT in config file

Simple request made by Solarmystic on the forums. Allow you to change
the number of recent isos saved by ppsspp. Default is set to 12.
Set 'F3' on keyboard to toggle, in addition to left thumb stick (for keyboard users)
Fix graphics screen 'Fps Limit' from being unable to close out, making options below it unreadable.
Reorganize bit the UI
FPS limit : auto-switchable between 30 to 240
Added sceJpeg & sceMd5
Merge pull request #1813 from mattweb28/add-modules

Added sceJpeg & sceMd5
Merge pull request #1811 from makotech222/fix-fpslimit

Fps limit fixes
Better fit for 800x480
Add Android internet permission, for reporting to work.