transitory state, won’t compile

ones in Individual to perform recombination

Used to find an alignment and then recombine at the given positions

given the recombination points, performs the actual fission/fusion of chromosomes
(we need to create Dna_7 from here: bad fix by making the ctor public

call multiple times align_score to find a good enough match
between the 2 chromosomes

stupid way to compute the alignment at two points of the chromosomes
TMP: we should find a smarter way to do it

If we do not give the length, it removes all promoters after pos