Added parsing of linkage type and label for GO dependent xrefs obtained from SwissProt files.
Added parsing of linkage type and label for GO dependent xrefs obtained from SwissProt files.

mjg17/ensembl,muffato/ensembl,willmclaren/ensembl,at7/ensembl,mjg17/ensembl,mjg17/ensembl,muffato/ensembl,danstaines/ensembl,Ensembl/ensembl,Ensembl/ensembl,james-monkeyshines/ensembl,muffato/ensembl,at7/ensembl,danstaines/ensembl,james-monkeyshines/ensembl,Ensembl/ensembl,muffato/ensembl,james-monkeyshines/ensembl,willmclaren/ensembl,at7/ensembl,at7/ensembl,Ensembl/ensembl,danstaines/ensembl,mjg17/ensembl,james-monkeyshines/ensembl