hamming distance first iteration
hamming_distance is correct
fasta parsing
trying to solve gc problem
hidden_message.py coerced into solving Finding a Motif in DNA problem
added mortal rabbits file
mortal rabbits implemented by storing rabbits born at time t, and all rabbits at time t
mortal_rabbits doesn't use Fn-2, it now looks at the number of mature rabbits, born rabbits, and dead ones