Merge pull request #405 from mozilla/other/component-docs

doc/index.md

package.json

scripts/doc/build.js

scripts/doc/index.js

src/components/animation-mixer.js

src/components/audio-feedback.js

src/components/avatar-replay.js

src/components/block-button.js

src/components/bone-mute-state-indicator.js

src/components/bone-visibility.js

src/components/cardboard-controls.js

src/components/character-controller.js

src/components/controls-shape-offset.js

src/components/css-class.js

src/components/cursor-controller.js

src/components/duck.js

src/components/event-repeater.js

src/components/freeze-controller.js

src/components/gltf-bundle.js

src/components/gltf-model-plus.js