v3.7.0

Improvements:

• File upload exercises: Allow students to participate and submit their files
• Prevent force push in student git repositories in programming exercises
• Guided tour for the online code editor
• Improve and simplify the result display for programming exercises
• New option for programming exercises: automatically run all submissions after due date
• Improve delete dialogs

Bugfixes:

• Resume programming exercises works again
• Fix code editor for Safari
• Fix issues in Python / C template for programming exercises
• Fix several small issues when participating in programming exercises