Update gas-preprocessor submodule to use the latest version.
Update Rakefile to install the gas-preprocessor if it not found.
Move the screenshots out of the way.
Hide the status bar.
Add a auto-launch debug test and some log.
Fix a trivial deprecation warning.
Fix the slider bar vertical position for iOS 7.
Add a way to dump the audio samples to the trace log.
Minor code clean in the audio manager.
Add CocoaPod to integrate NSLogger.
Use NSLogger, or NSLog as a fallback.
Changed the deployment target to iOS 7.
Fix a few warnings for that.