fix: missing pivotscaling before comparing matrices

now canonicalizing cones will properly scale pivots to one,
so that the system of inequalities and equations becomes unique,
and cones can be properly compared via those two matrices.
Merge pull request #388 from YueRen/spielwiese

fix: missing pivotscaling before comparing matrices
add: document orderings rp, rs
chg: updated test results for ringmod2m.tst
chg: updated test result for groebner_l
chg: edited factorizep_l.tst to quash differences on 64 bit machines