Make build config compatible with webpack 2.1
Make build config compatible with webpack 2.1

- Automatic -loader module name extension removed.
- CommonsChunkPlugin now only takes a single argument.
- configuration.resolve.extensions[0] should not be empty.
- Options `debug`, `progress`, `colors` do no longer work.

tomastrajan/angular-js-es6-testing-example,tomastrajan/angular-js-es6-testing-example,tomastrajan/angular-js-es6-testing-example