Peakachu

1. re-wrote most modules to improve code readability and make it easier to maintain
2. lowered down the memory usage for score_chromosome and score_genome
3. made CLI of score_chromosome, score_genome, and pool subcommands more friendly to users
4. fixed several warning messages
5. improved the pooling algorithm according to my latest experiences for 4DN joint analysis.
6. trained and released a series of models using a high-confidence loop set at 5kb, 10kb, and 25kb resolutions, and at various sequencing depths