Ember CLI Babel Polyfills

An Ember addon (v2.0.1, latest) that automatically produces split builds of Babel polyfills (using core-js directly since v2.0.0) for evergreen and legacy browsers. It injects three script tags into index.html: polyfill-shared.js, polyfill-evergreen.js, and polyfill-legacy.js (the latter with nomodule attribute to skip modern browsers). Key differentiator: dynamic polyfill generation via Babel's presetEnv, so only necessary polyfills are shipped to each browser category. Suitable for Ember apps using Babel 7+; drops support for Babel 6 in v2.