Add python testing.#71

Open

hsorby wants to merge 3 commits intoLungNoodle:developfrom

hsorby:add_python_testing

Commits on Jul 31, 2018

Fix some compilation warnings.
hsorby
committed
Add initial Python testing framework along with some documentation.
hsorby
committed
Rejig check_node_xyz_2d function to return a value. This is a more c-like way of returning a single variable.
hsorby
committed