Add support for the Python 3 version of ArcPy installed with ArcPro

[cgmorton]

The only obvious change is probably in the ConfigParser module used for reading the INI file, but because of how the scripts are currently structured, this will impact almost every script.

In Python 3 this module was modified and renamed to "configparser". There is a backport version of the module available for Python 2 but this would add an extra (possibly confusing) step to setting up the scripts.

Before the scripts start getting used too much, we could consider switching to a different format for the input file. The YAML files seem to be pretty popular/trendy right now.

[Stumpelton]

Hi - I made the ConfigParser change you suggest above to configparser throughout the package. I get an error on lamba unpacking in the support_functions.py file. Apparently it can't be done in Python 3 like how it's being done currently in Python 2.