[glob2-devel] Towers shooting explorers

[Eli]

I've just committed changes that will make Guard Towers shoot explorers,
and make explorers avoid towers when exploring or wandering randomly.
(The latter is implemented really badly yet, and I've been having
trouble testing it, so it might not even work, but it should be better
to get it out there than let it fester on my hard disk.)

Basically that's it. Discuss.