Testing commit for OS X trackpad and scroll events.

Now:
- code is wrapped for OS X releases (10.6 and 10.7)
- It now detects scrollwheel (old mouse) and gesture strokes (mighty mouse or trackpad).

If you have 10.6, things will work as for release. 

Next todo for tomorrow: make trackpad work actually smooth and not with steps.
Will also try to figure out the device type, to handle mighty mouse differently.

intern/ghost/intern/GHOST_SystemCocoa.mm

@@ -1577,9 +1577,21 @@ GHOST_TSuccess GHOST_SystemCocoa::handleMouseEvent(void *eventPtr)
 			}
 			break;
 			
+		case NSEventTypeBeginGesture:
+			m_hasMultiTouchTrackpad = true;
+			break;
+		case NSEventTypeEndGesture:
+			m_hasMultiTouchTrackpad = false;
+			break;
+			
 		case NSScrollWheel:
 			{
-				if (!m_hasMultiTouchTrackpad) {
+				int momentum = 0;
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
+				momentum = [event momentumPhase];
+#endif
+				
+				if (!m_hasMultiTouchTrackpad && momentum==0) {
 					GHOST_TInt32 delta;
 					
 					double deltaF = [event deltaY];

intern/ghost/intern/GHOST_WindowCocoa.mm

@@ -595,6 +595,11 @@ GHOST_WindowCocoa::GHOST_WindowCocoa(
 	
 	[m_window setAcceptsMouseMovedEvents:YES];
 	
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
+	NSView *view = [m_window contentView];
+	[view setAcceptsTouchEvents:YES];
+#endif
+	
 	[m_window registerForDraggedTypes:[NSArray arrayWithObjects:NSFilenamesPboardType,
 										  NSStringPboardType, NSTIFFPboardType, nil]];