politici/institutions added to politici api list
api for op_potere in politici and territori added
authentication added to users list and details
Merge branch 'master' of github.com:openpolis/op_api3
extended comments on institutioncharges and locations api added
Merge branch 'popolo-dev' of github.com:openpolis/op_api3 into popolo-dev
requirements adjusted
api now can be browsed starting from the root path /; re-factored api_root functions with classes; introduced SortedDicts