mono/monomac — pull request #73 by dalexsoto (2012-09-03 17:42:23+00:00)
Title: Added Support for OS X 1.8 User Notification Center 

Added NSUserNotification, NSUserNotificationCenter and NSUserNotificationCenterDelegate Classes

So now we are able to use notifications in MonoMac Projects

Simple Example
```
NSUserNotification not = new NSUserNotification();
not.Title = "Hello World";
not.InformativeText = "This is an informative text";
not.DeliveryDate = DateTime.Now;
not.SoundName = NSUserNotification.NSUserNotificationDefaultSoundName;

NSUserNotificationCenter center = NSUserNotificationCenter.DefaultUserNotificationCenter;

center.DidDeliverNotification += (sender, e) =>
{
Console.WriteLine("Notification Delivered");
};

center.DidActivateNotification += (sender, e) =>
{
Console.WriteLine("Notification Touched");
};

center.ShouldPresentNotification = (c, n) => { return true; };

center.ScheduleNotification(not);
```