Fixed TODOS in Entity class

Merged width/height/position attributes into the shape attribute.
Updated constructor and getters to match the modifications.
Updated Area class to match the modification on its superclass.
Updated Static entity class.

Fixed some TODOs and updated the constructors to match the previous
modification on the superclass.
Updated Factory class.

Updated the getTree factory to match the modification on Entity class.
Also fixed minor todos.
Updated Main class to match previous modifications on Entity class.
Uploaded WrongParameterWIMException.

An instance of this class is thrown each time the WIM model detects
wrong parameters when a constructor is called.
Fixed some TODOS on Game class.