ES6 ember-handlebars & ember-handlebars-compiler: 1.
ES6 ember-handlebars & ember-handlebars-compiler: 2.
ES6 ember-handlebars & ember-handlebars-compiler: 3.
ES6 ember-handlebars & ember-handlebars-compiler: 4.
Merge pull request #4537 from trek/es6-handlebars

Es6 handlebars