Added convenience methods for NSWindow CollectionBehaviors.
Added Smooth Resize method to NSWindow.
Renamed smooth resize options in WindowExtensions.
Add convenience method to set NSWindow top border thickness.
Some color properties shouldn't have been set to properties after all, since they can raise exceptions when not in the correct colorspace.
One more property
Added a convenience method to make a window's background color transparent, a great effect for splash windows!
Added a few more examples to the NSWindow Example.