I added a new entity list to the engine called misc. Misc entities will
simply be displayed and will not be tested for collisions. One use is
when en entity (player or enemy) explodes and pieces/debris needs to be
added to the game at the locaiton of the killed entity to give the
illusion of the entity breaking apart. See the game GalacticWarReboot
with respect to UFOs and and the player ship for an example of the misc
enetity list usage.