Created new bullet prefab
 - Blaster Beam
 - Yellow Bullet
 - Blue Bullet
Modified bullet prefab
 - Red Bullet
Modified bullet folder name
 - bullet --> Red_Bullet
Modified weapon folder name
 - blaster_beam --> Blaster_Beam
   (expected not to work properly, as I think now, because Windows doesn't check case)
Added projectile enums
Modified Scene(platform location)