[Feature] Set memory and time limits

[frol]

What do you think about adding extra options to be able to set memory and time limits for a given program?

It is not hard to add echo(memory_limit, "/memory.limit_in_bytes") and timer_settime(), but I would like to know whether it is ok to do it in cgmemtime project.

Any input is valuable. Thank you for this great project!

[gsauthof]

I think such options are a good idea and they would fit well into cgmemtime.

Feel free to create a pull request.

[frol]

@gsauthof Ok, I will make some refactorings and create a pull request.