Add support for game controllers

Limelight/ControllerSupport.h

@@ -0,0 +1,20 @@
+//
+//  ControllerSupport.h
+//  Limelight
+//
+//  Created by Cameron Gutman on 10/20/14.
+//  Copyright (c) 2014 Limelight Stream. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface ControllerSupport : NSObject
+
+-(id) init;
+
+-(void) cleanup;
+
+@property (nonatomic, strong) id connectObserver;
+@property (nonatomic, strong) id disconnectObserver;
+
+@end