Systems created, systems are part of an arraylist for each ship. they
are connected to rooms through a roomindex variable which corresponds to
the targetname of a room on the ship. adding stuff to ships has also
been updated. there are now add methods for units, rooms and systems,.
damage room method has been created, give it a damage and it'll subtract
from shields, damage ships and systems, shield system created, the
actuall shield level stat is inside the ship itself but all other stuff
is inside the shield class.