Format fix html files in 2015, update bugs file

2015/mills1/index.html

@@ -456,7 +456,7 @@ bit easier for you:</p>
     DG=&#39;&quot;Tap to Flap!&quot;&#39;     # Instruction text.
                             # Change to your native tongue.
                     # NOTE: The string MUST be enclosed inside double quotes.</code></pre>
-<p>WARNING: if you have good eye-hand coordination and too much time on your hands
+<p><strong>WARNING</strong>: if you have good eye-hand coordination and too much time on your hands
 you might fall asleep while playing as you probably will never die in this mode.
 We only stopped when a reminder came through and we tried to mark it complete at
 the same time as playing and we almost managed to survive that. At that point we