Project user data using pre-calculated ordinarions

[rabdill]

• Load user file
• Calculate new axes
• Generate R notebook with ggplot2 snippets?

[rabdill]

We could also offer more ordinations here than in the web application, if we want to evaluate e.g. rarefying at higher than 3000 reads, or doing ordinations using the "Aitchison PCA" that's implemented as "rclr" in vegan, as of 2.7.0-1:

https://github.com/vegandevs/vegan/pull/667
https://github.com/vegandevs/vegan/issues/743

[rabdill]

Resolved in #32
424c326