0.0.7B - Hierachy change... ToolBox takes over.

* The class ToolBox is now in charge of handling the events for both
it's UI and all the tools it holds.

* The individual tools serve no purpose by themselves. They must be
called by the ToolBox.

*LevelEditor has less responsibilities. Now only holds levels to be
forwarded to the ToolBox. In the future, LevelEditor may hold a role for
mass alterations of all Levels held in the World file.