update polyphen version
Added Age of Base documentation
Merge branch 'master' into feature/ageOfBranchDocUpdate
Basic docs homepage, with links only to non-Ensembl-specific content
New example gene with a better gene tree
Replaced hardcoded GENCODE id with link to stats page
Species prefix field can not be null
Minor changes to HTML
Merge branch 'feature/ageOfBranchDocUpdate'
Merge branch 'master' of https://github.com/Ensembl/public-plugins