JSCBC-85: Make total_rows available from view requests.

Added a third parameter to the http callback that passes
back miscellaneous information (only the total_rows at the
moment).

Change-Id: Ib142d845d39714a3ca7399a9eb9d892b3e853c47
Reviewed-on: http://review.couchbase.org/30869
Reviewed-by: Matt Ingenthron <matt@couchbase.com>
Tested-by: Brett Lawson <brett19@gmail.com>