Remove imp and just use importlib to avoid memory error when importin…
- [ ] closes #13282

Remove imp from pandas.show_versions() to fix memory problem.

hmm, `importlib` is only available in PY3 I think.

can you hack something from this:
https://pypi.python.org/pypi/importlib (don't want to add as a dep)
 `importlib` is in 2.7, does pandas still support 2.6?
 oh, then that's ok
 ok this looks good. ping when green.
 thanks @nparley 
