[WIP] More mutations

Time to start expanding things.

So far:
A needed upgrade to the debug-mutation code (it currently can't handle threshold-granting or post-threshold traits; this lets you grant/revoke thresholds manually)
The long-promised Ectothermic (like Cold-blooded, but now should grant bonus speed above 65F, needs Lizard)
Alpha gets a few more mundane traits to improve odds of getting Prime

More to come!