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.
# Until model subclassing is a possibility, a mixin class is used to add
# the necessary functions that may be contributed for geographic objects.
class GeoMixin:
"""
The Geographic Mixin class provides routines for geographic objects,
however, it is no longer necessary, since all of its previous functions
may now be accessed via the GeometryProxy. This mixin is only provided
for backwards-compatibility purposes, and will be eventually removed
(unless the need arises again).
"""
pass