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.
Merge branch 'development'

I added a new misc entity list to the game engine. I added this b/c in certains games, entities may want to be displayed and do not need to be checked for collisions with other entities. The misc entity list is not compared with any other entity lists during execution of the game loop. One example could be when an entity is killed and parts/debris of the entity need to be dislayed shooting away from the entity's position, these parts/debris can be added to the misc entity list.