Implement AnnotationDriver::addExcludePath

Hi,
I've been having issues with AnnotationDriver crawling in my directories and loading files.
I have a few classes that require specific libraries loaded, and I don't want the AnnotationDriver to load them.

For example, I have my descendant of PHPUnit_Framework_TestCase in libs and the driver just dies, because PHPUnit is not loaded, and I don't want to load it, to be able to finish the process.

Solution would be add method AnnotationDriver::addExcludePath, whose name speaks for itself

Temporarily, I had to extend the AnnotationDriver and overload the crawling process, which is realy annoing, because I had to copy the whole method with all its exceptions and I would have to maintain it, till this will be in Doctrine. Can be viewed here https://github.com/Kdyby/Framework/blob/master/libs/Kdyby/Doctrine/Mapping/Driver/AnnotationDriver.php

Thanks
Filip