Moved the creation of the hash to the Compara side
Moved the creation of the hash to the Compara side

Also note that the Compara methods have been heavily optimized and the
whole dataset is retrieved in <= 5 queries regardless of the number of
homologies actually fetched (fetch_all_by_dbID_list .... yeah ! )

helensch/ensembl-rest,helensch/ensembl-rest,willmclaren/ensembl-rest,ens-lgil/ensembl-rest,ens-lgil/ensembl-rest,ens-lgil/ensembl-rest,willmclaren/ensembl-rest,willmclaren/ensembl-rest,ens-lgil/ensembl-rest,ens-lgil/ensembl-rest,helensch/ensembl-rest,helensch/ensembl-rest,helensch/ensembl-rest,willmclaren/ensembl-rest,willmclaren/ensembl-rest