Revert "Merge pull request #31 from ADmad/master"

Reverting back to using the pear package for CakePHP as using packagist
included tests in core which causes problems with autoloading.

This change was broken anyway since updating the core path in index.php
was missed.

This reverts commit 425158d47b3c95a297fd5ae6a60b8b099b285c9c, reversing
changes made to b9dcfbf317a700a7478a38362df2fe2723057f04.