Character Rig Update (#50)

* model-inflator component

* Add <a-proxy-entity>

* Update a-gltf-entity and a-proxy-entity

* Update bone-visibility to use near zero scale.

* Update naf-janus-adapter to master for testing

* Update remote template

* Fix typo in data-selector

* Fix infinitely recurively attaching templates.

* Update getNetworkedEntity.

* Temp camera scale fix

* Remove a-proxy-entity

* Set player rig hips and head rotations.

* Head and hand visibility. Controller positions WIP

* Update yarn.lock

* Fix nametag transform. nametag-transform -> billboard

* Fix hand IK and watch positioning.

* Remove unused avatar assets and components.

* Re-implement avatar scaling for AR.

* Remove avatar scale from character-controller.

* Apply hand offset.

* Set some rough hand offsets for vive

* Remove setAttribute calls.

* Use hand-controls2 offset locally.

* Update audio feedback.

* Extract billboard component. Fix setting nametag on load.

* Fix GLTFCache and add setTimeout explanation.

* Inline onLoad and onError

* Made requested changes to ik-controller

* Remove middle-eye entity.

* Remove bone-visibility component.

* Fix invRootToChest

* Update networked aframe

* Pass in handState to updateHand

* Fix a-gltf-entity loading when cached.