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/StreamConfiguration.h

@@ -19,6 +19,7 @@
 @property int frameRate;
 @property int bitRate;
 @property int riKeyId;
+@property int streamingRemotely;
 @property NSData* riKey;
 @property int gamepadMask;