This is just a draft: calculate and cache number of rebels for groups
This is just a draft: calculate and cache number of rebels for groups

``votation_detail.html`` needs the number of rebels on a group
basis. That value must be stored within the GroupVote class
itself.

This commit is a first (not working) attempt to fix this. Please,
check it out.

openpolis/open_municipio,openpolis/open_municipio,openpolis/open_municipio,openpolis/open_municipio