Power

The power analysis notebook. Expanded notebook text is on [google docs](https://docs.google.com/document/d/1CQPlAue1mVFOd811cKGuy4fibFs5abR-wTjaeW6Wu0I/edit?usp=sharing).
Would you like a class, and then each of these built on a class and that class submitted to skbio? Or, do you want me to write the repeatedly logic as a "format axis" function, and then the axis into that?