Fixed another case IntermediateSerializer for correctly handling char type deserialization.
FontDescription and related types (CharacterRegion) are now compatible with the IntermediateSerializer according to XNA specifications.
FontDescriptionImporter now uses IntermediateSerializer rather than directly parsing xml, this matches XNA behavior. This allows derived FontDescription types to be deserialized and processed in a custom processor while reusing the stock FontDescriptionImporter.
Adding unit test which uses IntermediateSerializer to deserialize a child type of FontDescription.
Merge pull request #3079 from SickheadGames/MergeImportedProject

FontDescription / IntermediateSerializer compatibility