fixed duplicate records on ID search #430

Also found issue where paging would break if 50 or more records had the
same view key (reported date).  Added additional parameter
`startkey_docid` to view query to begin paging at the correct place.

Also removed _.throttle() to handle scroll throttling because it
occasionally makes multiple requests during a scroll, reverted to the
separate setup and cancel functions.
Merge branch 'develop' of github.com:medic/kujua-lite into develop