Add additive-color demo
Merge pull request #52 from alancutter/additiveColorTransform

Add additive-color demo
Update dependencies, start to migrate to web-animations-next
Remove legacy-polyfill-loader
Update for changes in polymer
Port starfield to web-animations-next
Port touch to web-animations-next
Port globe to web-animations-next
Remove unused copy of polyfill from touch demo
Port bounce to web-animations-next
Remove unused copy of web-animations.js from globe
Disable older not-yet-ported demos.
Further cleanups to demos.js
Remove native/polyfill demo breakdown
Switch to the new web-animations-js
Update note about expandoboard
Add web-animations-js-legacy
additive-color should use legacy polyfill
Reenable more demos using the legacy polyfill