Recode fasta_extract / Improve process assembly_filter

Improve process assembly_filter

Do not perform twice fasta_extract.pl, if you have huge number of contigs you should do it one time only.

Develop a script which write 2 files :

• contig selected
• contig discarded

For example select_contig.py --input contigs.fa --list_select selected.txt --select output_select.fa --discard output_discard.fa

If the contig is not in select list write it in discard file.