D dim momenta and states

[GDeLaurentis]

Merging branch with definition of D dimensional states and D dimensional momenta generator

[scarlehoff]

Wouldn't it make sense to add also a test "run amplitude in D eq 6" or something a bit more fancy than 4?

Perhaps even with fixed numbers like a regression test, to make sure that if we go around changing stuff it works also when doing things that are not 4D.

[GDeLaurentis]

Added a test to match Caravel in D=6 with genuine D=6 momenta. Could add a couple more internal consistency tests in D>4.

[scarlehoff]

I've tried solving the conflicts, for the tests I've had to add singular manually, but it should not be required for the rest of the code right? Or is it a general dependency now? It was not clear to me.

[GDeLaurentis]

Singular is required to generate D dimensional phase space points, functions dDimPhaseSpaceQRing and random_phase_space_point. If the phase space point is provided then it should not be needed. Only if those functions are called a call to Singular is made.

Perhaps I should check that syngular can be imported even if Singular is not installed.

[scarlehoff]

Could you also add a couple of lines to the example notebook RE what it is doing? I think it is a nice addition because it shows an example of use but it is hard to follow if you don't know what is happening.

In the meantime I'll add a few wrappers around things like another_j so that it has a more friendly name.