Expand Callback Variables

Hello,

My suggestion would be to add an execution callback variable for @execution_passed, which would provide us with the number of passed test cases in an execution set. Since you have @execution_failed, I feel like this would be only right ha-ha. Additionally, I think it could be extremely beneficial if you were able to add a test case callback variable that had a URL link that would bring you to a list of variables generated in the run like the current system has for screenshot/browser log/video. Thanks! :)