New Feature: Introduce Templates Targeting ES2015

[ryanelian]

TBA when #258 is completed.

Candidates

vue-es2015 same as vue

react-es2015 same as react but uses the latest and greatest MobX which cannot run in ES5 browsers.

Future Notes

• When Vue 3 targeting ES2015+ browsers is released, we'll be ready.

• Uncertain, but might flip the naming for ES5-targeting templates to es5-[framework_name], for example es5-vue

[ryanelian]

For consideration: add new template: Dojo 3, which works with TypeScript out of the box, with TSX support.