Purpose of this pull request:
Add Fabrication gem support for FactoryProf #22
What changes did you make? (overview):
Is there anything you'd like reviewers to focus on?
I assumed that one app may have bundled with both FactoryGirl and Fabrication. Respective integration spec reflects this case.
I did not include neither readme updates, nor changelog entries yet. I can get them ready if the reviewers would find this PR worthy to merge.