Add some additional functions for stats to stats.py script.
This included getStudents, getUsers, getMentors, getOrgAdmins, countStudentsWithProposals and some style fixes.
Patch by: Pawel Solyga
Reviewed by: to-be-reviewed
# Django settings for the example project.
DEBUG = True
TEMPLATE_DEBUG = DEBUG
ROOT_URLCONF = 'examples.urls'