Create contig_stats.pl

This perl script summarizes statistics for a fasta file containing DNA sequences. This includes general statistics for the whole file, including the total # of sequences and base pairs (bps), N50 and average sequence length. It also provides statistics for each sequence including its length, %G+C and % of non-N bps (sequences are sorted from longest to shortest). It is possible to choose sequences by their length (-min_length, -max_length) and also generate a fasta file of sequences that matched criteria (-fasta T).