add ability to spawn pen from hud (replacing the space bubble toggle); disable space-bubble as default

Support env var for adding environments to picker

Remove Farspark resolution logic from gltf-model-plus

Whitelist the media-loader component

Don't use TextureCache for videos

various updates to support moving the duck and pen into the gltf-component data of the environments instead of hubs.html and getting rid of interactable-template again

Add a super-cool loading cube.

# Conflicts:
#	src/components/super-spawner.js
#	src/hub.js
#	src/utils/media-utils.js

allow changing color and scale via mouse when holding alt or shift keys; fixing/changing input for rift.

Feature/object spawn telemetry

Support for basic video synchronization