Parsing pretty format input

[fjames86]

Would be useful to be able to parse pretty input of polynomials, i.e an input of the form x^2 + 2z -> (make-fpoly '(x z) 2 #(0 0 1 2 0 0))

Steps would be:

1. Split the string into monomials of form [number][][^power1][[][^power2] ...]
2. merge all the variables and find the highest degree
3. collect all the coefficients into an array and make a polynomial

Also in the future might be good to allow bracketed sub-polys e.g. (x^2 + 2z)*y^3 etc

[fjames86]

could also add a reader macro to facilitate entering polynomials at the repl. would be easy with a parse written above. e.g. #{x + y^2} -> (make-fpoly '(x y) 2 #(0 1 0 0 0 1))

[fjames86]

done. reader macro #{ } also added