Cleaning up some TODO warnings.

Author: slembcke

cocos2d/CCTextureCache.m

@@ -91,11 +91,10 @@ -(id) init
 		_loadingQueue = dispatch_queue_create("org.cocos2d.texturecacheloading", NULL);
 		_dictQueue = dispatch_queue_create("org.cocos2d.texturecachedict", NULL);
 
-		#warning TODO
+		// Skip the GL context sharegroup code for Metal.
 		if([CCConfiguration sharedConfiguration].graphicsAPI == CCGraphicsAPIMetal) return self;
 
 #if !__CC_PLATFORM_ANDROID
-		#warning TODO might not be a GL view.
 		CCGLView *view = (CCGLView*)[[CCDirector sharedDirector] view];
 		NSAssert(view, @"Do not initialize the TextureCache before the Director");
 #endif

cocos2d/Platforms/iOS/CCAppDelegate.m

@@ -178,7 +178,7 @@ - (void) setupCocos2dWithOptions:(NSDictionary*)config
 			break;
 #if __CC_METAL_SUPPORTED_AND_ENABLED
 		case CCGraphicsAPIMetal:
-			#warning TODO
+			// TODO support MSAA, depth buffers, etc.
 			ccview = [[CCMetalView alloc] initWithFrame:bounds];
 			break;
 #endif

cocos2d/Platforms/iOS/CCMetalView.m

@@ -39,7 +39,7 @@ - (id) initWithFrame:(CGRect)frame
 	{
 		_context = [[CCMetalContext alloc] init];
 
-		#warning Temporary. Move into CCRenderDispatch?
+		//TODO Move into CCRenderDispatch to support threaded rendering with Metal?
 		[CCMetalContext setCurrentContext:_context];
 
 		_queuedFramesSemaphore = dispatch_semaphore_create(CC_METAL_MAX_QUEUED_FRAMES);