CHANGES

tl;dr Borers now symbiotes rather than parasites. Think organic pAIs. Fixes #49.

Cannot suicide as host anymore.
Cannot kill your host anymore.
Thought-speak is more subtle.
Borers can secrete more chemicals (some of which are unlockable).
Borers have a new Evolve verb to unlock new chems (and eventually, abilities and ~~host-related things~~)
Removed dickish chems.
Forced-control on entering host is configurable. Add borer_takeover_immediately to gameconfig.txt to enable.
Removed borers' ability to multiply, for now. (Balancing)
Borers now only have a survive objective.
Borers are instructed to be helpful and non-dickish, including a note of recent changes.

TODO

Fix ventcrawling
Verify hearing host as borer and captive_brain
Game-mode replaced with vermin event.
need to make a browse window for the Evolve verb
- abstract it into a research-tree datum for re-use in RD.