Print out polynomial

[andis854]

A feature that prints out the polynomial with respect to a variable would be useful, something like this:

https://github.com/gifnksm/polynomial-rs/blob/master/src/lib.rs

(search for the "pretty" function).
Optimal would be if the polynomial could be printed using "println!".

[jacks0n9]

Check out PR 32 that I made four months ago. Since then, I have made my own polynomials library with display and support for dividing a polynomial by another polynomial. It's called polynomials_pro.