Updated master branch to include Max6 API conventions.
Minor changes: cast long to int in perform routine, etc. Rebuilt externals.
Now NUM_MUTEX define references SYS_PARALLEL_WORKERS rather than hardcoded value. maxmspsdk.xcconfig updated for Xcode 4.5.x.
Implemented lockless approach from zns.connect.
Merge branch 'max6'

Conflicts:
	externals/zns.multireceive~.mxo/Contents/Info.plist
	externals/zns.multireceive~.mxo/Contents/MacOS/zns.multireceive~
	externals/zns.multisend~.mxo/Contents/Info.plist
	externals/zns.multisend~.mxo/Contents/MacOS/zns.multisend~
	include/zns.multiconnect_impl.h