Add admin panel for users and votes

Closes #2

views/admin_users.erb

@@ -0,0 +1,55 @@
+<h1><%= _("Admin") %></h1>
+
+<h2><%= @user.email %></h2>
+
+<p><%= _("Created: %{date}") % { date: format_date(@user.created_at) } %></p>
+
+<p><%= _("Updated: %{date}") % { date: format_date(@user.updated_at) } %></p>
+
+<p><%= _("Admin: %{admin}") % { admin: @user.admin ? _("Yes") : _("No") } %></p>
+
+<h2><%= _("Organized votes") %></h2>
+
+<% unless @user.organizers.blank? %>
+
+<ul>
+<% @user.organizers.each do |organizer| %>
+  <li>
+    <%= organizer.user.email %>
+    <a href="/admin/users/<%= @user.id %>/organizers/<%= organizer.vote.id %>/delete"><%= _("Delete") %></a>
+  </li>
+<% end %>
+</ul>
+
+<% else %>
+
+<p><%= _("No vote organized.") %></p>
+
+<% end %>
+
+<h2><%= _("Ratings") %></h2>
+
+<% unless @user.ratings.blank? %>
+
+<ul>
+<% @user.ratings.collect { |rating| rating.vote }.uniq.each do |vote| %>
+  <li>
+    <%= vote.title %>
+    <a href="/admin/users/<%= @user.id %>/ratings/<%= vote.id %>/delete"><%= _("Delete") %></a>
+  </li>
+<% end %>
+</ul>
+
+<% else %>
+
+<p><%= _("No rating.") %></p>
+
+<% end %>
+
+<% if @user.ratings.blank? and @user.organizers.blank? %>
+
+<form action="/admin/users/<%= @user.id %>/delete" method="post">
+  <button type="submit"><%= _("Delete user") %></button>
+</form>
+
+<% end %>