LABS genetic operators

I implemented genetic_ops behaviour that computes [LABS](http://militzer.berkeley.edu/sequences.html "Low Autocorrelated Binary Sequences") problem with local search. Solutions are lists of 0s and 1s but for now it should be sufficient.
Line 29 is too long: "    lists:unzip([recombination_features(F1, F2) || {F1, F2} <- lists:zip(S1, S2)]).".