Enumeration support

[Gleb Gadyatskiy]

Hi,
Enumerations are not supported. Attached test fails.

Could you please suggest how to fix?
Thank you in advance
enumeration.zip

[Igor Maznitsa]

I made fix of stackoverflowexception dring <clinit> but I'm not sure that it is possible to use enums because java.lang.Enum is abstract one and there should be implemented complex solution to support extension of such abstract class because it will not be possible to make constructor call for instantiation exception