CBLT-255:  add dashboard page

Change-Id: I839e5f49cf9a652b7909ee0f4b9d8d3c9c544b6c
Reviewed-on: http://review.couchbase.org/39743
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>