URL parameters are now URL decoded by the webservice
The tests now URL encode the parameters for every request.
Art2Presence relations are now creatable with POST requests to /artnet/metadata/art and listing the presences in the body.
Art2Presence tests have been introduced with relate_art.py
Also updated column name artist.description artist.name to fit a db schema update.
Added scripts to test various API calls of the webservice by creating, modifying and deleting entries from a test database of ArtNet. Do NOT use those on production.
