added lazy loading of gene_member if member has adaptor Also added methods:   gene   transcript   translation which use the genome_db->db_adaptor to connect to the core and fetch the corresponding core objects related to this compara member A compara ENSEMBLPEP can fetch all types, but a ENSEMBLGENE can't fetch a transcript or translation.
added lazy loading of gene_member if member has adaptor
Also added methods:
  gene
  transcript
  translation
which use the genome_db->db_adaptor to connect to the core and
fetch the corresponding core objects related to this compara member
A compara ENSEMBLPEP can fetch all types, but a ENSEMBLGENE can't fetch
a transcript or translation.

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