Setup JSDoc

[Morgul]

Currently, while there's some comments, there's no cohesive documentation on how to use the project. We need to improve the comments, and setup jsdoc (as well as probably making TravisCI build our documentation and publish to gh-pages.

Edit: Here is a description of how to do it: https://medium.com/@nthgergo/publishing-gh-pages-with-travis-ci-53a8270e87db