Loads a saved session variables, settings and test results to the shell.

def do_load(self, arg):
        """Loads a saved session variables, settings and test results to the shell."""
        from os import path
        import json
        fullpath = path.expanduser(arg)
        if path.isfile(fullpath):
            with open(fullpath) as f:
                data = json.load(f)

            #Now, reparse the staging directories that were present in the saved session.
            for stagepath in data["tests"]:
                self.do_parse(stagepath)
            self.args = data["args"]