Added XML comments.
Let's make this property be available also, so we can document it properly.
Use the Set* method pattern (like we already have with SetAddress), so we can do proper thread marshalling as needed.
Changed TItle to be a DP and implemented the SetTitle method.
Handle the IWpfWebBrowser.Title property and use it to update the title of the MainWindow.
Added the TItle here also, for documentary purposes. We should consider creating online documentation from our classes when their level of information is of a more decent level.