This is a short introduction to run the C-IBI method:
(see J. Chem. Phys. 144, 174106 (2016))

1) run few steps of IBI (pre folder).

2) take potentials from initial IBI runs: A-A.pot.new, B-B.pot.new and A-B.pot.new.

3) rename *.pot.new to *.pot.in.

4) run the C-IBI (this folder).
