Extend the API to allow for a timed delay in the refresh

Currently, it is near impossible to implement a timed delay for the Views refresh action. The theme object should have a "timeout" property that can be set in the theme hook method to implement a delayed refresh. For example, the following code would pause the refresh for 5 seconds.

viewsFlagRefresh.theme.prototype.themeHook = function() {
  this.timeout = 5000;
}