- fixed all instances of this in core code
- deleted previous Zend Guard Loader workaround in MY_Kohana.php
- updated Bootstrap.php to reflect deleted MY_Kohana.php
- added MY_Kohana to provide wrapper for auto_load(), which loads dummy class when none found.
- revised Bootstrap to load MY_Kohana.
This is based on the patch described here: http://blog.teatime.com.tw/1/post/403