Pass authtoken in from user, and add a wrapper for web UI on Mac.

ext/mac-ui-macgap1-wrapper/MacGap/Classes/CallbackDelegate.h

@@ -0,0 +1,20 @@
+//
+//  CallbackDelegate.h
+//  MacGap
+//
+//  Created by Joe Hildebrand on 1/10/12.
+//  Copyright (c) 2012 Twitter. All rights reserved.
+//
+
+#import "Command.h"
+
+@interface CallbackDelegate : Command {
+}
+
+@property JSObjectRef callback;
+
+- (id) initWithContext:(JSContextRef)aContext forCallback:(WebScriptObject*)aCallback;
+- (id) call;
+- (id) callWithParams:(id)firstOrNil, ... NS_REQUIRES_NIL_TERMINATION;
+
+@end