Added some missing fmpz_poly functions to roadmap.txt.
Added some missing fmpz_poly functions to roadmap.txt.

fredrik-johansson/flint2,jpflori/flint2,fredrik-johansson/flint2,dsroche/flint2,wbhart/flint2,fredrik-johansson/flint2,wbhart/flint2,wbhart/flint2,dsroche/flint2,dsroche/flint2,dsroche/flint2,jpflori/flint2,jpflori/flint2,jpflori/flint2