Incorrect evaluation at objects that are not numbers

[cafaxo]

Suppose we have a polynomial p = a_0 x^0 + a_1 x^1 + ... + a_n x^n where the a_i are in a ring R. Then I would expect p(α) = a_0 α^0 + a_1 α^1 + ... + a_n α^n to hold for all α in a ring S where R is a subring of S.

This is currently not the case. Example:

julia> Poly([0,0,1])([0 1; 0 0])
2×2 Array{Int64,2}:
 0  1
 0  0

but [0 1; 0 0]^2 == [0 0; 0 0].

[jverzani]

This is due to this definition polyval(p::Poly, v::AbstractArray) = map(x->polyval(p, x), v) which is basically doing p.(A) when A is a matrix. In #179 this call is an error. I wonder if it makes better sense to change the definition for p(A) to what you are expecting, as that seems natural. In #179 it seems to only require changing a + to a .+.

[jverzani]

Closed by #196