Proper builds

[shrimpza]

Make proper builds using npm, webpack and friends, rather than the weird thing currently.

[shrimpza]

This implies the following:

• [x] Dependency management via NPM
• [x] Refactor entire codebase to ES6 classes
• [x] Automated builds, producing downloadable and deployable artefacts for users who don't want the hassle of pulling and building themselves

[shrimpza]

In progress in https://github.com/shrimpza/aurial/tree/webpack-and-es6