Seamm-util

* Add list_definition.py with parse_list()
* Updated makefile for doctests.

* Some debug printing was accidentally left in the code.

* To better support Docker, moving ~/.seammrc to ~/.seamm.d/seamrc
* Moved seamm.ini from ~/SEAMM to ~/seamm.d since it only contains personal preferences.

* Versioneer needed to be updated to account for changes in configparser.

* Zenodo updated and made small changes to their API, which required changes in
SEAMM.
* Consolidated all private information about the user and their keys for Zenodo in
~/.seammrc

* added E_h/K --> kJ/mol/K