Adjusted OCLC url patterns to accept 6 digit numbers. Adjusted clean_oclc() filter to NOT return empty stinrg if number is less than 8 chars. Added logic to primary_bib function to cull GM bibs that have non OCLC numbers in the 035A field.  Changed OCLC index code for voyager query in local_settings.template. Should be 035A not 0350. Fixes #322