Iterative approach to obtain the equilibrium

Here's the general idea: if we solve potentially high concentration interactions and some turn out to be very weak, it is not possible for them to become stronger by including potentially lower concentration interactions.

Thus, the idea is to solve iteratively by gradually lowering the cutoff (--cutoff) and blacklisting weak interactions below a given threshold, and use that "extra" computational power on actually useful interactions.

• add a flag to blacklist some interactions
• add a wrapper script to interatively call mirbooking with an updated interaction blacklist and lower --cutoff value