Integrate chapters

Integrate chapters from [sysassets](https://github.com/angrave/sysassets) into a seamless tutorial chain.

Currently, content from sysassets must be deployed along with this project at its root, because github pages does not allow cross-origin requests. In case sysassets is not deployed alongside, the user is taken to the standard playground without chapter content. Hence, merging this branch into master is safe as functionality won't be affected even if sysassets is unavailable.

This pull request closes #16.