Natively implement PALP Normal Form
Working on matrix permutations.
First sweep of matrix2.pyx and permgroup_element.pyx
First sweep of matrix0.pyx
First pass over lattice_polytope, still errors.
Cosmetic changes.
Working on permutation normal form.
Fixed errors in palp_*-methods.
Rearranging and regrouping palp_* methods.
Fixing doctests.
Removed auto- and isomorphism code for the time being.
Removed normal form for Laurent polynomials.
Added normal form permutation read out from PALP.
Attempt at merging PALP normal form.
Working on linear transformations for normal form.
Inverse and affine transformations for normal forms.