Research point penalty for trading techs

**What do you want to see?**
If you trade a tech to another player, you should have to pay a penalty in research points to do so, configurable during game setup as a percentage of the cost of the tech.

**How would it help players?**
Makes tech trading less OP.

**Alternatives**
Probably some alternatives out there but who knows... cost could be in minerals instead but it makes more sense conceptually that you'd have to divert scientists from actual research to explaining your fancy new phasor beams to the Phong!

**Things to consider**
What if your cost is greater than your research income? We would need to use negative bonus RP to put the player in debt, and have it carry over if negative between turns.