Added get_all_homologous_Genes to Bio::EnsEMBL::Gene that returns the Bio::EnsEMBL::Gene and Bio::EnsEMBL::Compara::Homology objects for each corresponding homologous gene in the Compara DB. Changed EnsEMBL::Web::Data::Gene to use this call with the benefit that the Compara DB gets hit obce only per GeneView request

In deprecated chr_name call, I've changed the code so it projects to the toplevel, not to the chromosome.  All species used to have chromosomes, so this always worked - the meaning of this call is now the same as it was, with the addded bonus that it works for species without chromosomes

Fixed "Useless use of a variable in void context" error in Slice

changed is known to work the same way in Gene and Transcript and to see any status containing "KNOWN" as known rather than just KNOWN, e.g. "KNOWNXREF"

changed the way display_xref works in Gene and Transcript. Now takes DBEntry object as argument. Is lazy loaded on request, if its not set before.

relevant_xref_id columns.

 - These method calls in Gene.pm are delegated to Transcript.pm
 - The calls are species specific, removing the need to query the priority
   column the external_db table.