This returns the optimized url for zuul, which should dramatically
drop the amount of data transfered out of zuul. It also uses the ajax
method which lets us ensure that we don't schedule another pass
through the loop until we completed the current request.
Add support for jquery visibility optimization
Change-Id: I0e50f07fd9165e7a45c2712f6b1c4b3601759cba
c4b4073367