Fix #1454 (awarding "There are two of them!")

[Pikrass]

See issue #1454.

I chose to preserve the description and make the code award the badge (a) when colonizing, and (b) when surviving the fight.

The other possible solutions are:

• change the description to "fight against two opponents" and do nothing to the awarding mechanism
• change the description to "win against two opponents" and check success but not fledging

The first solution is not really challenging. I have nothing against the second one, I just didn't think about it. :)

This code is mostly untested, I don't have the Time right now. I'll do that later, unless you're quicker.

[eternaldensity]

Seems like the right fix to me. Looks okay. Don't expect me to be quicker, I'm recovering from surgery.