Add file header; tweak comments

hued

@@ -1,4 +1,14 @@
 #!/usr/bin/env ruby
+# encoding: UTF-8
+#
+# hued - Philips (friends of) hue policy daemon
+#
+# Hued is Copyright © 2011 Paul van Tilburg <paul@luon.net>
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2 of the License, or (at your
+# option) any later version.
 
 require "chronic"
 require "eventmachine"
@@ -10,6 +20,7 @@ require "pp"
 # The main engine class
 class Hued
 
+  # Scenes
   Scenes = {}
 
   # Program version
@@ -111,6 +122,7 @@ class Hued
       end
     end
 
+    #######
     private
 
       def test_conditions