Fast extraction of transcript infos for target genes from file
 with all
transcript infos.

Result is the same as extract_fasta
 do, but extract fasta redo all
the process
 of
transcript infos extraction (for targets) from scratch,

while select_only_target_genes script doesn't recalcuate
anything
but only parses file.

Both scripts are useful: select_only_target_genes allows fast
 extraction
of target
 transcripts, while extract_fasta allows
to recalulate just the
small part of all genes
 after algorithm
 changes.

It can be much faster than calculate all from the
 beginning and
 extract
targets after that.