Added settings for displaying varying levels of the onscreen controls

Limelight/Input/OnScreenControls.h

@@ -10,9 +10,16 @@
 
 @interface OnScreenControls : NSObject
 
+typedef NS_ENUM(NSInteger, OnScreenControlsLevel) {
+    OnScreenControlsLevelOff,
+    OnScreenControlsLevelSimple,
+    OnScreenControlsLevelFull
+};
+
 - (id) initWithView:(UIView*)view;
 - (void) handleTouchDownEvent:(UIEvent*)event;
 - (void) handleTouchUpEvent:(UIEvent*) event;
 - (void) handleTouchMovedEvent:(UIEvent*)event;
+- (void) setLevel:(OnScreenControlsLevel)level;
 
 @end