Python3 cffi bindings

[David Bremner]

Floris Bruynooghe <flub at devork.be> writes:
> Anyway, I found the code, checked things work, updated tests on new
> python versions, added a very basic intergration with the test
> framework and squashed the commits.  Otherwise the attached patch
> is just a plain dump of the current state so interested people have
> at least a copy of the code again which can be made to work.

I think you missed the attachement. Other than that, sounds interesting ;).