Fix crash & compiler warnings, enable rotation on RMMarker.

@@ -185,6 +185,6 @@ typedef struct {
 
 - (void)didReceiveMemoryWarning;
 
-- (void)setRotation:(float)angle;
+- (void)setRotation:(CGFloat)angle;
 
 @end

@@ -597,7 +597,7 @@
   }
 }
 
-- (void)setRotation:(float)angle
+- (void)setRotation:(CGFloat)angle
 {
  	if (_delegateHasBeforeMapRotate) [delegate beforeMapRotate: self fromAngle: rotation];
 

@@ -54,7 +54,7 @@
         textForegroundColor = [UIColor blackColor];
         textBackgroundColor = [UIColor clearColor];
 		enableDragging = YES;
-		enableRotation = NO;
+		enableRotation = YES;
     }
     return self;
 }

@@ -65,6 +65,7 @@
 
 -(void) dealloc
 {
+	[[NSNotificationCenter defaultCenter] removeObserver:self];
 	[super dealloc];
 }