retrying with generators

[Euphorbium]

Will this work with a generator, and would it be possible to resume retrying from the failed state in a generator, not from the beginning?

[suanmeiguo]

I just tried it myself, don't think it'll work with generators. Basically the retry library doesn't take effects if it's on a function yield stuff.

[fcracker79]

I have implemented generator support. Here it is the pull request:

#83

I am waiting for some feedback from retrying library author.

[fcracker79]

Given the feedback I received after a week, I wonder if there is still a maintainer of this project.
@rholder could you please review the pull request?