Modified the handling of left join in generic_fetch to allow aliasing left joined tables
Modified the handling of left join in generic_fetch to allow aliasing left joined tables

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