New view for families

I made a request (#352392) some time ago about having a view for Families under Multi (without any gene / species as reference), the same way we have that for gene trees.

New view: http://enssand-01.internal.sanger.ac.uk:9073/Multi/Family?fm=ENSFM00660001157320
The content is the same as http://www.ensembl.org/Homo_sapiens/Gene/Family/Proteins?db=core;family=ENSFM00660001157320;g=ENSG00000139618;r=13:32889611-32973805

I agree that it would benefit from a better integration, but in the meantime, it is still useful: the view can be linked from the search results (cf discussion that we had with Stephen T) and from http://www.ensembl.org/id/ENSFM00660001157320

The first commit is to make the views get the information directly from the Family object, instead of passing via $object, which may not be defined in the other view
The second is the actual configuration for the view. I have tried to mimic the configuration of the gene tree view