More documentation + 2 methods to deal with alternative trees / subtrees
More documentation + 2 methods to deal with alternative trees / subtrees

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