Added -delete_unmapped option to only delete stuff from the unmapped_object table if the option is specified. This makes it easier to do "patch" xref runs without clobbering the unmapped data from a previous full run.
Added -delete_unmapped option to only delete stuff from the unmapped_object table if the option is specified. This makes it easier to do "patch" xref runs without clobbering the unmapped data from a previous full run.

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