Moved change_log to CHANGES.md

Markdowned the hell out of that change log!

CHANGES.md

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+# Change Log for the Are You A Human PHP Integration Library
+
+## 1.1.6: 11/12/2012:
+* minor change to doHttpsPost() so that it only uses cURL if the curl_exec()
+  function is available.
+
+## 1.1.5: 11/07/2012:
+* refactored ayah.php so that the class is only defined if it does not already
+  exist.  This will help to eliminate PHP errors/warnings when implementing
+  multiple PlayThrus on the same page.
+* added AYAH_DEBUG_MODE constant to the ayah_config.php file to make it easier
+  for users to set debug mode to TRUE/FALSE.
+* added code to read/use the AYAH_DEBUG_MODE constant from the config file.
+* refactored __construct() to accept 'debug_mode' as an option in the $params
+  array...also to make it easier for users to set debug mode to TRUE/FALSE.
+
+## 1.1.4: 09/24/2012:
+* refactored __load_config_file() to not use __DIR__ because it is not
+  supported in PHP versions prior to 5.3.0.
+
+## 1.1.3: 09/12/2012:
+* fixed typo in debug message that prevented a debug value from displaying.
+* added a note about "Lightbox" to the header of the sample.php file.
+
+## 1.1.2: 08/28/2012:
+* added the __load_config_file() function and refactored __construct() to use
+  it.
+  * this function looks for the ayah_config.php file in two places:
+    1. the current directory
+    2. the directory where the ayah.php file resides
+  * refactored __log() to store messages into a buffer if debug mode is not on.
+  * added the __flush_message_buffer() function and refactored debug_mode() to
+    use it.
+  * added log messages to show the current publisher key, scoring key and AYAH
+    webservice hots.
+
+## 1.1.1: 08/09/2012:
+* moved code that includes ayah_config.php into __construct() and log a debug
+  message if not found.
+* added code to getPublisherHTML() to check that site is able to connect to
+  AYAH webservice.
+* added code to getPublisherHTML() to support setting runtime options. fixed
+  minor bug in doHttpsPost()
+
+## 1.1.0: 07/25/2012:
+* added public functions:
+  * debug_mode()
+  * get_version_number()
+* refactored error logging to use debug_mode().
+* minor refactoring to several routines to make them easier to read/maintain.
+* fixed bug in doJSONArrayDecode().
+
+## 1.0.2: 03/21/2012:
+* Changed the script tag to include language="JavaScript" and
+  type="text/javascript" for maximum compatibility.
+
+## 1.0.1: 12/12/2011:
+* Add fallback support for JSON decode with Michal Migurski’s library
+* Add fallback support when there is no cURL library
+* Changed the handling for the constants so that, if they don’t exist, it
+  doesn’t freak out
+* Changed the handling for ayah_config.php so that, if it doesn’t exist, it
+  doesn’t freak out
+
+## 1.0.0: 11/15/2011:
+* Initial release with script-implementation support