Merge pull request #524 from mozilla/feature/drawing

package-lock.json

package.json

src/assets/hud/spawn_pen-hover.png

src/assets/hud/spawn_pen.png

src/assets/stylesheets/2d-hud.scss

src/components/css-class.js

src/components/cursor-controller.js

src/components/grabbable-toggle.js

src/components/in-world-hud.js

src/components/input-configurator.js

src/components/media-loader.js

src/components/super-networked-interactable.js

src/components/super-spawner.js

src/components/tools/drawing-manager.js

src/components/tools/networked-drawing.js

src/components/tools/pen.js

src/gltf-component-mappings.js

src/hub.html

src/hub.js

src/input-mappings.js