Lua static member access improvements.

1) Static members and static functions inside class can be accessed as ModuleName.ClassName.FunctionName (MemberName respectively). Old way aka ModuleName.ClassName_FunctionName still works.
2) Same goes for enums inside classes: ModuleName.ClassName.EnumValue1 etc.
3) More 'runme' tests for lua + modifications to existing tests to test new changes.

Code is loosely based upon python implemenation of the same thing.

Patch #62.