Allowed time stretching filters by keeping per-channel timeStamps.
No need to clear buffers before rendering channels
AERecorder: separate startRecording method
Add AEAudioControllerRenderMainOutput()
Merge branch 'official_master'

Conflicts:
	Modules/AERecorder.h
	Modules/AERecorder.m
Merge remote-tracking branch 'official/master'
Minor tweak to use NSString * const for notifications
Moved an audio unit interaction to main thread to avoid strange deadlock issue with Inter-App Audio use
Merge branch 'master' of git://github.com/TheAmazingAudioEngine/TheAmazingAudioEngine
add timestretching to audio unit file player
remove timestretching
Merge branch 'master' of https://github.com/lijon/TheAmazingAudioEngine
Merge commit 'cdd139' into HEAD
store timestamp in file player