read_notebooks should be able to take a glob

[rgbkrk]

Instead of having to have a special directory to read from, I'd like to be able to read in a collection of notebooks like this:

pm.read_notebooks('out-*.ipynb')

I'm assuming this could probably be done with the glob module.

[mpacer]

Would it create a list of notebook node objects obeying my the order spat out by the glob?

[mpacer]

If this were python 3 only, I'd say it should accept any iterable that can return filepath objects or strings that map onto filepaths (which I believe is what glob natively returns).

[rgbkrk]

Would it create a list of notebook node objects obeying my the order spat out by the glob?

Yeah I think so.

If this were python 3 only, I'd say it should accept any iterable that can return filepath objects or strings that map onto filepaths (which I believe is what glob natively returns).

We're Python 2.7 + Python 3. I think we could let the argument be a string or a non-string iterable, handling both the glob and directory version, while also letting it take an iterable.