added new method fetch_by_region_unique which returns the non duplicate regions. This is mainly for getting non duplicated regions like assembly patches or haplotype regions
added new method fetch_by_region_unique which returns the non duplicate regions. This is mainly for getting non duplicated regions like assembly patches or haplotype regions

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