Add acceptedStudentsCSVExport function to stats.py script. This funtion is used to generate CSV with all accepted students. It still needs some work and I left TODOs there. I also added helper function for saving data to CSV, which can be reused for other kinds of reports.

def create_spatial_db(test=True, verbosity=1, autoclobber=False):
    if not test: raise NotImplementedError('This uses `create_test_db` from test/utils.py')
    from django.db import connection
    connection.creation.create_test_db(verbosity, autoclobber)