Port for macOS (#311)

* merged moonlight-mac with moonlight-ios

* reverted to the original project.pbxproj

* cleaned up the code, fixed lots of unnecessary code duplications

* multicontroller support (not tested)

* new class that can be used for further modularization of the MainFrameViewController

Limelight/Stream/StreamManager.h

@@ -12,7 +12,12 @@
 
 @interface StreamManager : NSOperation
 
+#if TARGET_OS_IPHONE
 - (id) initWithConfig:(StreamConfiguration*)config renderView:(UIView*)view connectionCallbacks:(id<ConnectionCallbacks>)callback;
+#else
+- (id) initWithConfig:(StreamConfiguration*)config renderView:(NSView*)view connectionCallbacks:(id<ConnectionCallbacks>)callback;
+#endif
+
 - (void) stopStream;
 
 @end