Fetch Spec support fails on destination attribute

[doclaphroaig]

When parsing a fetch spec, an lhs key path that is of the form 'toObjA.toObjB.objBAttribute" fails.
This seems a pretty common use case.

[rentzsch]

I actually haven't run into this, so I haven't bothered implementing it. I'd welcome a Pull Request if you'd like to take a stab at it. See also https://github.com/rentzsch/mogenerator/blob/master/mogenerator.m#L172 and #15

[scottroberts140]

Is there any update on this issue? I installed mogenerator yesterday and ran into this situation. I had to delete the fetch request from my data model in order to generate the files.

[rentzsch]

dup of #15