app/views/shared/_person.html.erb
<a href='/users/<%= person.login %>'><img src='<%= person.avatar_url %>'
alt='<%= person.login %>'
title='<%= person.login %>'
class="img-rounded avatar <%= size rescue nil %> <%= "author" if person.author %> <%= "voter" if person.can_vote? %> <%= "admin" if person.admin? %>" /></a>