#1749, 1754, 1901 - Eliminate incompatibility with Zend Guard Loader.
- 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
Merge pull request #150 from shadlaws/fix_zend_guard_loader_issues

#1749, 1754, 1901 - Eliminate incompatibility with Zend Guard Loader.