v4

v4 stable (20200403)

Summary of changes since v3:

• Added lots more words
• Added note in README.md about changing passwords and token files
• Corrected typo in comment
• Added support for boxes (mystery box, dybbuk box, etc)
• Added support for challenges (24 hour challenge, 3 AM challenge, etc)
• Remove duplicate "surveillance" from studies (was already in conspiracy)
• Remove unneeded plurals