_hasSystemError should stay false when we actually recovered from error
Merge pull request #57 from lijon/recovery_fix

_hasSystemError should stay false when we actually recovered from error
AEAudioUnitChannel/Filter: Add an initializer with a preInitializeBlock argument

Some audio units properties need to be set before the unit is initialized, this
can now be done in the block passed as preInitializeBlock.
AEAudioUnitFilter: add missing observer for AEAudioControllerDidRecreateGraphNotification
Merge pull request #58 from lijon/auchannelfilter_initblock

Added "preInitializeBlock" initializer for audio unit channel/filter
Corrected order of filter invocation
Merge remote-tracking branch 'official/master'