Add scripts for benchmarking

Add operating system

Create LICENSE

Add example and result explanation

fixed a bug of inter overflowing

added calc_msa_rdregs_bspoa and calc_cns_rdregs_bspoa

brings improvements to this projects

kmer_striped_seqedit_pairwise: cmin maybe zero

fixed a bug at load_binary_msa_bspoa

fixed a bug in row_max and row_backcal, then tidy functions

add new function clip_reads_msa_bspoa

fixed a overflow bug in tidy_msa_bspoa; marked SNVs in MSA with \"~\" in the MPOS ruler

remove debug print

use normal distribution for binomial when depth is high

minor