Sort the Stanley composition by denominator class

This avoids multiple evaluation of denominator classes
nmzIntegrate: evaluate denominator class after last simplex of the class
nmzIntegrate: simpler Stanley dec sorting
nmzIntegrate: change back to CoCoAlib 0.9951

for performance reasons
nmzIntegrate: add ifdef for compilation without OpenMP
nmzIntegrate: Order exponents earlier

The exponents get ordered directly after the affine linear transformation,
this saves a lot of memory in big examples.

Verbose output: corrected number of simplicial cones done