nunaliit2-couch-user: Add user servlet to report display names and other
public information.

Issue #72
nunaliit2-couch-user: Continue work on user servlet: obtain multiple
users in one call.

Issue #72
Fix issue where geom-layer view returns error because of reduction.
First, fix queryView in n2.couch.js to always add query options as
parameters and only "keys" as POST body. Second, make new view called
"geom-layer-bbox" to separate areas of concerns. Remove reduce function
from geom-layer.

Issue #73