Now supporting ordered fields. This is only supposed to run together with branch 'creation_counter' of mamba-storm.
Removed storm monkeypatching from Mamba. Sovles #28 and PYM-9.
Merge pull request #33 from nicholasamorim/field_ordering

Added support for ordered fields in the SQL schema generation. Resolves #32 and #34, and #close PYM-9 and PYM-8

    * Added __new__ method in mamba.model.Model class that remember and uses the definition order of the mdoel properties so we can use it to generate ordered schemas
    * Removed monkeypatchs from mamba code related with storm and implemented them in native way on mamba-storm