String + UI change: New dialog for Tomboy addins

["Boyd Timothy" <btimothy gmail com>]

I've moved most of our old Plugins to use the new Mono.Addin support.
With this, there's a new AddinInfoDialog (exactly the same as the info
dialog used in MonoDevelop).  The code for it is found in
Tomboy/PreferencesDialog.cs.  When a user highlights an addin in the
preferences dialog and click on the "Information" button, this new
dialog will appear and show them additional information about the
addin.

New strings in this dialog:

Version:
Author:
Copyright:
Add-in Dependencies:

Thanks,

-Boyd