Rewritten EGSpeciesFactory common module; removed dependencies on ensembl-production code, and made it more efficient and flexible, as per EG-2545 and EG-2654
Rewritten EGSpeciesFactory common module; removed dependencies on ensembl-production code, and made it more efficient and flexible, as per EG-2545 and EG-2654

Ensembl/ensembl-production,Ensembl/ensembl-production,Ensembl/ensembl-production