Fix memory leak caused by monitoring app switching

The code that monitors app switching, relinquishing control
of the media keys to another process in its white list, was
causing a huge memory leak. Instead of fixing it, I decided
it wasn't a feature I wanted to support. This change simply
comments out the feature and fixes the memory problem.

PianoKeys/SPMediaKey/SPMediaKeyTap.m

@@ -25,7 +25,8 @@ @implementation SPMediaKeyTap
 -(id)initWithDelegate:(id)delegate;
 {
 	_delegate = delegate;
-	[self startWatchingAppSwitching];
+    // This was leaking memory like a sieve
+	// [self startWatchingAppSwitching];
 	singleton = self;
 	_mediaKeyAppList = [NSMutableArray new];
 	return self;