Move normaliz specific code to HeLP_INTERNAL_TestSystemNormaliz

[fingolfin]

This shows a way forward with PR #22: move the code specific to 4ti2 and normaliz into dedicated small helper functions. I did it here for Normaliz: the left-over 4ti2 code would be easy enough to adapt.

So the plan forward would be:

• do the same for the 4ti2 code
• copy the two helpers into two separate files which get loaded by extension mode
• unify the various duplicated files you added again by calling the helpers

To make it especially smooth, you could do this:
In the main file, you have roughly this

HeLP_INTERNAL_TestSystemNormaliz:= function(arg)
  Info( HeLP_Info, 1, "Normaliz has been spcified as solver, but NormalizInterface needs to be loaded for this work");
end;

In the extension file you then have

HeLP_INTERNAL_TestSystemNormaliz := function(T, a, k, pa, temp)
  ... real code here
end;

And in HeLP_INTERNAL_TestSystem you just call HeLP_INTERNAL_TestSystemNormaliz.

Does that make sense?

[margollo]

Yes, sounds like a way to go! I will take care of it soon