Cron Semi-Safe Mode; Misc Fixes

• Implement cron semi-safe mode
• Fix: Update hall of heroes to work with API v3
• Fix: Correct task checklist updating/deleting
• Fix: Prevent task cloning from cloning challenge objects
• Fix: Display beast/mount master counts on member modals even if member does not have any pets or mounts
• Fix: Make /static/api redirect to /apidoc
• Fix: Correct api documentation for task score route
• Fix: Correct minor task sorting bug

Misc fixes

• Fix cancelling Stripe subscription
• Fix buying gems with Paypal
• Fix unlocking items with numbers in path

v3.0.0

See this blog post for the big changes from version 2 of the site's API to version 3.