FIX: [rtmp] do not hardlink librtmp
bump to Gotham 13.1 beta1
Merge pull request #4678 from koying/fixdroidrtmp

FIX: [rtmp] do not hardlink librtmp
[music] fix albumartist being used as a filter in song smartplaylists
Merge pull request #4680 from MartijnKaijser/13.1_b1

13.1 b1
Merge pull request #4664 from Montellese/broken_checks

fix broken comparisons
Conflicts:
	xbmc/settings/windows/GUIControlSettings.cpp
[DualAudio] Update README info
[DualAudio] make Audio Engine Interfaces support 2nd audio
[DualAudio] make Audio Engine Utilities support 2nd audio
[DualAudio] make Audio Engine ffmpeg encoder support 2nd audio