o set tapReady to false in showPageByHref so that tap handler is not   invoked while in the middle of a previous request
o set tapReady to false in showPageByHref so that tap handler is not
  invoked while in the middle of a previous request

(merged with thgit changes.)

nicinabox/jQTouch,beedesk/jQTouch,beedesk/jQTouch,nicinabox/jQTouch