New-MofFile updates

Fixed code around enums; underlying type needed to be translated to equivalent CIM type instead of putting the .NET framework type into the schema file.

Also revised code to check equality of type literals instead of doing string comparisons, which will make the code more robust when dealing with unknown type accelerators, System namespace included or excluded, etc.
Bumped version number of DscDevelopment module.
Merge pull request #74 from dlwyatt/NewMofFileUpdate

New-MofFile updates