Database object interface to BioFetch retrieval

 Bio::DB::BioFetch is a guaranteed best effort sequence entry fetching method.
 It goes to the Web-based dbfetch server located at the EBI
 (http://www.ebi.ac.uk/Tools/dbfetch/dbfetch) to retrieve sequences in the
 EMBL or GenBank sequence repositories.
 .
 Bio::DB::BioFetch implements all the Bio::DB::RandomAccessI interface, plus
 the get_Stream_by_id() and get_Stream_by_acc() methods that are found in the
 Bio::DB::SwissProt interface.