Trying (unsuccessfully) to get species name to propagate from microbe editor to microbe stage.

It would be really useful to have the simple-population-dynamics stuff done for
this, since working with data being passed from one Microbe instance to another
is just plain ugly. It would be much better to have the species passed back and
forth (in the handshaking of MicrobeEditor:activate and update, and who knows
where else), and just create clean microbe instances.

Anyway, I won't bother with this name-passing any more in this branch, better
to do it in 191 after 130 is merged.

See #130, #191