Added tag Camera_Pivot to Camera_Pivot for health bars to possibly rotate with camera
Added Red rectangle above Enemy_Default called Enemy_Default_Health and tagged it Health. For now, it's planned to scaled with the enemies health and maybe rotate with the camera (Scaling Sphere is also an idea).
Adopted scaling sphere as health bar. Altered health slightly in code to now have vars cur_health and max_health. The scale of the health_sphere is determined by .5 (cur_health / max_health) and is calculated at start and within the take_damage method.

Also changed health to cur_health and max_health within Ship.cs
Merge branch 'feature/Add_a_little_health_bar_to_enemy' into develop