We attempt to work around an issue with some older versions of the

logging functions that didn't properly work with keyword arguments.

We used inspect.getargspec() to check for this, but this function is

deprecated and doesn't take into account keyword-only arguments, and

causes warnings on Python 3.
This change switches this over to use inspect.getfullargspec() when

available.

Ran tests (along with other upcoming changes) on Python 2.7, 3.4, 3.5,

and 3.6. I no longer hit any warnings with the logging calls.