Updates for v0.3 alpha

Added

• Custom Constraints
• Check tool in planning file
• Filter pannels
• Student Preferences (not considered in the optimization for now)

Changed

• Continuous timing instead of discretized timing (slots)
• Display-related data in new app displayweb
• Split init method in TTModel and WeekDataBase
• Improved docker settings

Removed

• None

Deprecated

• None

Security

• None

Fixed

• A lot...