pgx_bed.py - another schema for mapping fasta and bed record.

[progistar]

Issue:
In the pgx_bed.py, it plays mapping fasta and bed record by looking up a description in the fasta and a protein ID in the bed. However, the description in the fasta often contains either protein ID and other information; therefore, the mapping to bed sometimes does not work well.

Solution:
If the protein ID in the bed contains in the description of the fasta, then mapping each other.