Changed Timench.multiple_run() method and structure of it input of variable *args and **kwargs for multiple benchmarks run.
Before it was two separated dicts for args {case_name: [args, ]}, for kwargs {case_name: {kwargs, }}.
Now it is combined to single dict to simplify input of variables and control of it.
New structure named as env_args = {case_name: [[args], {kwargs, }], }
Usage examples 2 and 4 updated for correct run with updated multiple_run() method.
Initial release