Allow ListValidator to sort choices with None in the list.

See merge request !21

The ordering comparison operators are stricter about types in Python 3.

Remove old python2 ordereddict import attempts

See merge request !20

Build rhel7 packages off of python3

Closes #7

See merge request !18

On rhel7 continue to call the rpm

See merge request !17

On rhel8 call it

Build a python2 rpm for RHEL7 and python2 and python3 rpms for RHEL8.

See merge request !16

deprecating use of warn

See merge request !15

run flake8 on both python 2 and 3.

See merge request !13

This reverts commit cadab869.

This reverts commit ff3a4030.

i.e.  allow python setup.py test to do the right thing

added pipeline badges to readme.

See merge request !12

Added tests for QuestionSet as well.