soooooooo yet another update is ready

changes:

- added Pirate, it is like an assasin going forward and murdering the sheeps

and pigs (he does 20 damage, but he is usually defeated by a drachick). he can

really save your game sometimes

- added the Banner Bearer Sheep. is spawns as a commander of legios or

battalions

- fixed the spawner, so no more getting double points from monsters

- archer's damage got doubled to recompensate previous

- legios do now spawn again (they were broken for some time)

technical blablabla nobody wants to hear about:

- instead of each monster having its own damage methods, now there are only

three of them in the global FloatingEntity class:

* evil_do_damage() is the function responsible for sheeps damaging friendly

units

* evil_do_damage_break_walls() is the function used by pigs and drachicks. it

is exactly the same as previous except that it does damage walls too

* good_do_damage() is reversed version of the first one, used by the Pirate

- now a PlaceableEntity can be used to place down each entity, not only grid

ones. the placeable entities are divided by types