added SourceFile::getSupportedExtensions(), implemented on cocoa
implemented getSupportedExtensions() on windows, listing extensions by hand
Remove semicolon
Merge pull request #436 from superlukas/semi

Removing stray semicolon
Merge pull request #435 from cinder/audio_supported_extensions

Added audio::SourceFile::getSupportedExtensions()
Merge remote-tracking branch 'upstream/dev' into dev-scons