moving spawn-controller component to player-rig

* Make handlebars template plugin more flexible. Add crc hash to urls. Add origin trials. Add smoketest.

* Add origin trial token documentation

* Update readme to use crc hash.

* Correct smoketest urls.

* Move templatre generation into common and add env var to generate smoke tests.

* Move vendor assets into separate bundle. Clean public directory on build. Extract and optimize css. Move back to Uglify.

* Fix extract text plugin in dev.

* Update CONFIG comment

* Added webpack file loader and lobby background.

* Copy assets directory into public folder on build. Fix file-loader config to point at copied folder.

* Fix for webpack-dev-server when copying assets.

* Fix setting environment variables on windows.

update spawn positions

moving all the logic into a component, simplifying the math (taken from: networked-aframe spawn-in-circle.component.js)

users will now randomly spawn around the table facing towards the center (may vary depending on headset configuration)

Feature/auth for allhands

# Conflicts:
#	.gitignore

* Add HandlebarsTemplatePlugin and asset helper.

* Recompile on template change.

* Fixed cloning gltf models.

* Clone material and change component order to fix matcolor-audio-feedback component.

* Renamed gltf-model2 -> cached-gltf-model. Named anonymous function.