Paglias/no reloading

No more page reloading for groups operations!

I've removed promises for guilds, public guilds but not for party because otherwise when loading directly the party page (/#/options/groups/party) it wouldn't show up until the user browsed to another path and then back to the party page. 

Angular $scope mysteries here.

Everythign else works fine (I've added members population for guilds/party creation).

https://github.com/HabitRPG/habitrpg/compare/paglias;no-reloading?expand=1#diff-3af08874b33d0895ff0efacc39e1e087R174 is probably going to be slow but we need it or the user will see the public guild as joined.