JSON object returned by `osm-edit-report-service.mapbox.com` can have more information

[arunasank]

Currently the object is in the form

[
     {
          "key": <editor's name>,
          "color": <data-color>,
          "iduser": <editor's OSM id>,
          "values": [
                         {
                              "x": <first-date-object-in-date-range>,
                              "y": <objects-modified>,
                              "change": <changesets-created>
                         },
                         {
                              "x": <second-date-object-in-date-range>,
                              "y": <objects-modified>,
                              "change": <changesets-created>
                         },
                         ....
                         ....
                         {
                              "x": <last-date-object-in-date-range>,
                              "y": <objects-modified>,
                              "change": <changesets-created>
                         }
                     ]
     }
   ...
   <more such objects>
   ..........
]

Besides renaming keys as suggested in https://github.com/mapbox/osm-edit-report/issues/31, each user object can include the following keys:

• total-objects which contains the total number of objects modified by that user in the requested time range.
• total-changesets which contains the total number of changesets created by that user in the requested time range.

The color key in each user object can be removed since this is done in the front end.

The array of user objects can be nested in a parent object containing the following keys:

• total-objects which contains the total number of objects modified by all users in the requested time range.
• total-changesets which contains the total number of changesets created by all users in the requested time range.
• active-users which is an array of names of all active users (or a key active in each user object set to either true or false.)

Adding the above three consolidated keys will also be useful to resolve https://github.com/mapbox/osm-edit-report/issues/35.

cc @Rub21, @geohacker, @batpad.