Fixing a bug in the SharedDic :

When a plugin had no version, an exception was thrown when writing its plugindatas
Cleaning NoFocus tests :

- Removing some no longer used classes
- Creating a CKWindow : un window that has the Aero "glossy-effect" (extended frame)
- The CKNoFocusWindow has the glossy effet and is not focusable.
- Arranging some comments