Changed the property that holds the minimum age required for Students to participate in a GHOP based program. Added a new property student_min_age_as_of to hold the DateTime from when the minimum age should be reached. Changed student_min_age property to now store the student minimum age as an integer. This all feel more user friendly then letting the program admin calculate the required DateTime. Storing the two properties is then still needed in this case since information might be lost otherwise when the program admin brings up the edit view. Reviewed by: Lennard de Rijk

Remove now unneeded getCallback from ghop.__init__

Remove getCallback indirection in modules Instead, assume that the imported module contains the Callback class that was previously returned by getCallback. This is done to prevent a circular import (caused by the __init__ importing a submodule).

Removed authors from 'empty' __init__.py files.

Add HTTP_HOST to environ variables mocked. Also add license headers to run.py.

Added logic for every GHOP specific model. Defined logic for every model defined for GHOP. These logics do nothing special now. They are just inherited from their parent classes. Necessary GHOP specific logic will be added later as necessary. Reviewed by: Lennard de Rijk

Added licenses and fixed the authors of __init__.py for the GHOP module.