Add list of assigned users to role view page.

This surely could be better still; at least this is *something*.

tailbone/templates/roles/read.mako

@@ -0,0 +1,37 @@
+## -*- coding: utf-8 -*-
+<%inherit file="/roles/crud.mako" />
+
+${parent.body()}
+
+<h2>Users</h2>
+
+% if role is guest_role:
+
+    <p>The guest role is implied for all users.</p>
+
+% elif role.users:
+
+        <p>The following users are assigned to this role:</p>
+        <br />
+        <div class="grid clickable">
+          <table>
+            <thead>
+              <th>Username</th>
+              <th>Full Name</th>
+            </thead>
+            <tbody>
+              % for i, user in enumerate(role.users, 1):
+                  <tr class="${'odd' if i % 2 else 'even'}" url="${url('user.read', uuid=user.uuid)}">
+                    <td>${user.username}
+                    <td>${user.display_name}</td>
+                  </tr>
+              % endfor
+            </tbody>
+          </table>
+        </div>
+
+% else:
+
+    <p>There are no users assigned to this role.</p>
+
+% endif