//its okay if the column file does not contain all the names in the fasta file, since some distance may have been above a cutoff,
//but no sequences can be in the column file that are not in oldfasta. also, if a distance is above the cutoff given then remove it.
//also check to make sure the 2 files have the same alignment length.
//its okay if the column file does not contain all the names in the fasta file, since some distance may have been above a cutoff,
//but no sequences can be in the column file that are not in oldfasta. also, if a distance is above the cutoff given then remove it.
//also check to make sure the 2 files have the same alignment length.