Adding keyboard support

Limelight/Input/KeyboardSupport.h

@@ -0,0 +1,21 @@
+//
+//  KeyboardSupport.h
+//  Moonlight
+//
+//  Created by Diego Waxemberg on 8/25/18.
+//  Copyright © 2018 Moonlight Game Streaming Project. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface KeyboardSupport : NSObject
+
+struct KeyEvent {
+    u_short keycode;
+    u_short modifierKeycode;
+    u_char modifier;
+};
+
++ (struct KeyEvent) translateKeyEvent:(unichar) inputChar;
+
+@end