Remove formal licensing information in favour of a do-what-you-like-but-be-nice policy.

It's not like I'm going to hire a lawyer if you don't follow it anyway.
Fixes Issue #6

Author: IMSoP

README.markdown

@@ -38,4 +38,4 @@ Who?
 
 This project was originated by Rowan Collins, AKA IMSoP. My homepage is at <http://rwec.co.uk>, and you can reach me by e-mail on the obvious addresses @ that domain.
 
-The code here is licensed under [Creative Commons Attribution 3.0](http://creativecommons.org/licenses/by/3.0/). In other words, I'm happy for you to take it away, improve it, use it for whatever you like, but I'd like you to credit me as the originator. I'd also be more than happy to hear what you do with it, and how you've improved on it.
+The code here is free to use for any purpose whatsoever, but with a polite request that you treat it like Free Software, and a strong request that you don't pass it off as your own. I'm happy for you to take it away, improve it, use it for whatever you like, but I'd like you to credit me as the originator. I'd also be more than happy to hear what you do with it, and how you've improved on it.

simplexml_dump.php

@@ -11,7 +11,8 @@
  *
  * @author Rowan Collins
  * @see https://github.com/IMSoP/simplexml_debug
- * @license http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0
+ * @license None. Do what you like with it, but please give me credit if you like it. :)
+ * Equally, no warranty: don't blame me if your aircraft or nuclear power plant fails because of this code!
  */
 function simplexml_dump(SimpleXMLElement $sxml, $return=false)
 {

simplexml_tree.php

@@ -14,7 +14,8 @@
  *
  * @author Rowan Collins
  * @see https://github.com/IMSoP/simplexml_debug
- * @license http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0
+ * @license None. Do what you like with it, but please give me credit if you like it. :)
+ * Equally, no warranty: don't blame me if your aircraft or nuclear power plant fails because of this code!  
  */
 function simplexml_tree(SimpleXMLElement $sxml, $include_string_content=false, $return=false)
 {