Fix melee reactions.
fix all of the things.

make explosions happen at the right time, make blasters launch at the
proper time, make death sounds play at the right time. make units tally
at the right time, fix the state orders and stuff, yay.
fix multiplication error
add a "reset tile visibility" function

for debug mode, to make LOF checking easier.
Fix bigwall LOS issue at last

with thanks to DarkDefender, this monkey is finally off our backs.
should (hopefully) fix the ufos spawning on water scenario.
more fixing for reaction fire

only if we were hit, not just if we're mad.
fix sticky buttons.