Add Remorseful Prober algorithm

[Macr0Nerd]

"Like Naive Prober, but it tries to break the series of mutual defections after defecting."
http://www.prisoners-dilemma.com/common-strategy/

[dantesb777]

Hi @Macr0Nerd! I'm a newcomer and I'd like to work on this issue. I've studied the Remorseful Prober strategy: it acts like Tit-for-Tat but occasionally probes with a defection, and if that causes a counter-defection, it cooperates once to 'apologize' and reset the cycle.

Could you please assign this to me?