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

Moonlight macOS/Utility/keyboardTranslation.h

@@ -0,0 +1,18 @@
+//
+//  keyboardTranslation.h
+//  Moonlight macOS
+//
+//  Created by Felix Kratz on 10.03.18.
+//  Copyright © 2018 Felix Kratz. All rights reserved.
+//
+#include <CoreFoundation/CoreFoundation.h>
+#include <Carbon/Carbon.h>
+
+#ifndef keyboardTranslation_h
+#define keyboardTranslation_h
+
+CGKeyCode keyCharFromKeyCode(CGKeyCode keyCode);
+CGKeyCode keyCodeFromModifierKey(NSEventModifierFlags keyModifier);
+char modifierFlagForKeyModifier(NSEventModifierFlags keyModifier);
+
+#endif /* keyboardTranslation_h */