* Format Javascript and CSS files with `prettier`: `prettier --write 'CTFd/themes/**/*'`
* Format Python with `black`: `black CTFd` & `black tests`
* Travis now uses xenial instead of trusty.
* Fixing a bug where prerequisites could not be set for dynamic challenges due to a division by zero error where defaults were being set unnecessarily.
* Creating unit test for adding requirement to dynamic challenges
* Fix dynamic challenges to work in user mode and team mode (Closes#759)
* Add test for solving dynamic challenges and challenge de-valuation
* Add missing oauth_login link to team_enrollment.html
* Update CHANGELOG
* Update README
* Upgrade migration script to port visibility settings
* Add message about visibility settings and port over visibility settings
* Close#758
* Add tests for dynamic value challenges
Kevin Chung
Kevin Chung
Peter