added mesh reading, renamed polynom -> FEM
debugged mesh in FEM
Polynomial * and + works

The polynomial class has been restricted to
1 or 2 dimensions to keep me sane
added differentiation
added evaluation as __call__
diff now does antiderivs
2d call can now return polynomial
Integration working
added flat array get/set to poly
FEM now has input file parsing

It parses an input file dictating what is to be done.
A start on the element stiffness matrix began