Adding Dependency for pear.symfony.com/Finder

Dear Raphael, 

Thanks a lot for your module, it's been very useful to implement our unit test factory. 

I made a small addition to the pear package list to include pear.symfony.com/Finder, which is required by phpcpd and would not install as a dependency alone. 

So if you're interested... 

Have a nice day, 
Samuel