* Created a FileSystem class. FileSystem acts as a back end class for saving and loading data. Adding additional file types or data management options such as SQL will not be easier to implement by creating a new class that the FileSystem class can use.
* XmlSerialization class is no longer public. It's changed to internal and has its information passed to it via the FileSystem class.
Project Manager:
* Project Manager now uses the FileSystem class for saving and loading data instead of the XmlSerialization class.
MudDesigner no longer checks for the existance of the Data directory, this is handled by each editor independently.
Project Manager was checking the wrong directory for the project file, thus never letting the project file be loaded during startup.
