Added more channel layouts for FLAC
These are nonstandard but as of yet there has been no consensus on flac-dev
what the default layout for 6.1 and 7.1 should be
Only adjust kAudioUnitProperty_MaximumFramesPerSlice if necessary
Changed SimplePlayer to use ARC and made deployment target 10.7
Got rid of unnecessary PLAYER macro
Clearer struct initialization
Fix some channel mapping issues for devices with more than one stream