Update ObjectAL/ObjectAL/Support/OALAudioFile.m

Corrected formatting for SInt64 startFrame argument.
Merge pull request #37 from DmitrySkiba/patch-1

Update ObjectAL/ObjectAL/Support/OALAudioFile.m
No longer destroying/recreating ALDevice in the demos since it's unreliable.
Fix for multithreading issues when playing lots of sounds.
Removed some garbage files.
Fixed header copy phase.
Changed header dest path so that archive works.
Fix warnings in latest Xcode.
An audio track added to a muted audio track set will now be muted.
Demo app now stops all sounds when you leave a demo.
Fix: Interrupt from phone call would permanently stop OpenAL output in iOS 6.
Fix for deprecation warnings in iOS 6.
Fix: setSuspended was not synchronized.