I know the bot-people loves changes, so here is a bit more!
The token handling through use of a special url-argument "gettoken" and the special "itemtoken" has died in flames. Use "edittoken" from actione=tokens (http://wikidata-test-repo.wikimedia.de/w/api.php?action=tokens&type=edit...) and remember to log in.
https://bugzilla.wikimedia.org/show_bug.cgi?id=39366 https://gerrit.wikimedia.org/r/#/c/24559/
https://bugzilla.wikimedia.org/show_bug.cgi?id=35993
John