02_15_2014 - restructured OBJECT into SHIP, SPIKE, and BULLET.
02_15_2014 - renamed all spike objects and methods to enemy objects and methods
02_15_2014 - Added enemy linked list files
02_16_2014 - Refactored enemies arrays into new linked list format.
02_16_2014 - Bullet collisions working with new enemy lists
02_16_2014 - Updated enemy realignment after death to not have enemies stand still
02_16_2014 - Separated llist into enemy_llist and bullet_llist.  enemy_llist fully refactored successfully.
02_16_2014 - Bullets fully implemented with new bullet_llist linked list.
02_16_2014 - Enemy health and health change pictures implemented.
02_16_2014 - Enemies now fire bullets - no collision detection with ship.
02_16_2014 - Ship health implemented. Enemy bullets now damage ship. Game resets when health is depleted. Complex enemies completed.