Split jo_sprite.js into sprite_hero.js and sprite_guard.js
Each has functions belonging only to that "class" and both share common functions from jo_sprite.js
jo_sprite_backup.js is a perfect copy of jo_sprite.js from the last commit in case something goes terribly wrong.
Inheritance seems to be working fine.
Made computer that can deactivate cameras.  "Space" to deactivate cameras.