[jitter] experimental JitterAPI for Mac OSX

http://www.cycling74.com/twiki/bin/view/IncrementalDownloads

This is an experimental version of the Jitter framework which  
addresses specific issues on Mac OSX with the 'asyncread' message to  
jit.qt.movie and functionality of the spigot~ object. Users not using  
these Jitter features are advised to continue using the release  
version of the framework.

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Jitter 1.6.4-x1 :: Experimental Jitter framework

PLEASE NOTE THAT THIS SOFTWARE IS NOT AN OFFICIAL RELEASE VERSION,
BUT AN EXPERIMENTAL VERSION WHICH IS BEING PROVIDED TO ADDRESS A
FEW REPORTED ISSUES WITH THE JIT.QT.MOVIE OBJECT.

Release notes:

- Fixed a spigot~ error; (-2184 setting AudioChannelLayout for SOC)
- Fixed numerous stability problems associated with the "asyncread"  
method of jit.qt.movie