Change _create_underlying_Slices() method: simpler code and some more comments
Change _create_underlying_Slices() method: simpler code and some more comments

kumarsaurabh20/ensembl-compara,dbolser-ebi/ensembl-compara,Ensembl/ensembl-compara,dbolser-ebi/ensembl-compara,kumarsaurabh20/ensembl-compara,Ensembl/ensembl-compara,danstaines/ensembl-compara,ckongEbi/ensembl-compara,kumarsaurabh20/ensembl-compara,ckongEbi/ensembl-compara,danstaines/ensembl-compara,etapanari/ensembl-compara,danstaines/ensembl-compara,Ensembl/ensembl-compara,etapanari/ensembl-compara,Ensembl/ensembl-compara,etapanari/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,ckongEbi/ensembl-compara,Ensembl/ensembl-compara,etapanari/ensembl-compara,danstaines/ensembl-compara,dbolser-ebi/ensembl-compara,danstaines/ensembl-compara,kumarsaurabh20/ensembl-compara