Support listing and creating candidates
Display candidates nicely in candidate list
Only allow adding candidates to list when it makes sense

Only users in the list's locality who are not yet in the list are
options.
Merge branch 'candidates' of git://github.com/danielhers/open-shot into danielhers-candidates
bump version 0.8.9
Merge branch 'release/0.8.9' into dev
fix candidate addition
user can only support in his own locality, fixing #163
add more filters to user admin, fixing #290
fix broken profiles of candidates w/o candidate list
add locality filter to user admin