Send out a Notification upon creation of a new Request entity.
The receivers are specified by the corresponding Role logic this Role Request is for. Currently Organization and Club Administrators will receive "new request" messages about respectively Mentor and Club Membership requests.
Fixes Issue 442.
indexes:
# AUTOGENERATED
# This index.yaml is automatically updated whenever the dev_appserver
# detects that a new type of query is run. If you want to manage the
# index.yaml file manually, remove the above marker line (the line
# saying "# AUTOGENERATED"). If you want to manage some indexes
# manually, move them above the marker line. The index.yaml file is
# automatically uploaded to the admin console when you next deploy
# your application using appcfg.py.