adding stock simulation animation

css/main.css

data/users/ben.user

js/cam/Assembler.js

js/cam/Machine.js

js/cam/ShopbotExporter.js

js/menus/AnimationMenuView.js

js/menus/AssemblerMenuView.js

js/models/AppState.js

js/threeViews/ThreeView.js

main.html