v1.0.8

Changelog:

• Add 'hidden' field for test cases. Staff users can hide tests from students when locking
• Add --version flag to ok
• Add ok-lock, a command line utility available to pip users for locking tests
• Add ok-publish, a command line utility available to pip users for publishing a zip version of ok.py
• Internal restructuring

v1.0.6

Fixed Anon user singleton.