Webpack

Created by: bbert

Migrate bundler to webpack. What has been done:

• replace grunt by webpack
• replace jshint by eslint
• add dev task for watch mode
• add start task for running dev server with watch mode and hot reloading
• generate only minified files (with source maps) in build task
• add files section in package.json in order to publish only dist folder

To complete:

• publish files on ftp server
• update precommit git hook (@dsilhavy where git hooks are configured for this repo for all users?)