Explanatory comments throughout

[kylecordes]

Add more explanatory comments, and perhaps content in README files, throughout.

Assume that the reader may be somewhat familiar with Angular but not that familiar with the techniques and use.

Point out especially the large gap between what this is meant to represent, and a very primitive functionality currently present.

[kylecordes]

I'd like to achieve decent documentation "coverage" as shown by CompoDoc.