+ Removed a spurious '\n' from an ee_putstr().
  * src/starfield.c:
    + Fixed starfield color.
  * data/:
    + Fixed every sprite's colors.

+ Made sprite loading more robust.
  * src/explosions.c:
    + No longer use ee_putchar etc. to draw our sprites, but use
      ee_draw_sprite().
  * data/:
    + Drew explosion_medium and explosion_small sprites.