various tweaks

i tried to optimize the ship updater in tic.pl, i'm pretty sure it'll be faster without the temp table.

I modified ships_in_range_ view to use future health instead of current_health, otherwise it's impossible to determine when you should stop attacking a ship and move to the next one... imho if it's in range, i should be able to see if it's heavily damaged... 

I modified upgrade max_health to give you the health. otherwise you have to repair to get the health, which i think isn't fair, but i dunno.