Add ES6 and TypeScript support with Webpack and Babel

The OpenLMIS-UI needs to support multiple types of javascript language compilation. This will allow developers to take advantage of language features as needed.

Acceptance Criteria

• ES6

  • ES6 source files are able to be built into our Javascript files that get loaded into the browser

  • ES6 files are annotated by a '.es' file extension

  • ES6 files are tested with Karma

• Typescript

  • Typescript source files are built into our Javascript files that get loaded into the browser

  • Typescript files are annotated by an '.ts' file extension

  • Typescript files are tested with Karma

  • Typescript files are validated at build time

• Documentation is updated