feature: user administration

config.sample.json

@@ -12,6 +12,7 @@
     "projects": "http://localhost:8000/projects/",
     "customers": "http://localhost:8000/customers/",
     "events": "http://localhost:8000/events/",
+    "groups": "http://localhost:8000/groups/",
     "typeevents": "http://localhost:8000/typeevents/",
     "users": "http://localhost:8000/users/",
     "uploads": "http://localhost:8000/upload/"