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

from django.dispatch import Signal

request_started = Signal()
request_finished = Signal()
got_request_exception = Signal(providing_args=["request"])