Another addition to feature #40, better ajax.
Another addition to feature #40, better ajax.

There's a utility function that uses ajax to get config options from the
config table.  Now, if it's already made the call it uses the last
value, and doesn't make the same call again.  Memoization!  It's
efficient!

OpenCOP/OpenCOP,OpenCOP/OpenCOP,OpenCOP/OpenCOP