change build chain to use rollup...allows 'js:next' and reduces build from 45kb to 33kb minified (/lib --> /dist/commonjs folder, new /dist/es for rollup,...)
fixes detection when using both context and pluralization and context not found. #851
package.json entry points now to /lib not to mangled version...this might be the better solution for most use cases (build chains built on npm, webpack, browserify, node,...)