the default values for t' and t'' are now the values from the Hubbard Hamiltonian (they were 0 before); added the possibility to use a different dt for the Jastrow vpars (turned off by default, I am not sure how well this works)
the default value of the checmical potential is now the Fermi energy of the tight binding part (it was like that before, but I threw it out again when I rewrote the determinantal stuff)