Fix crash with Symfony2

For some reason the code in Symfony triggers a but in this code
that causes a PHP-Parser Doc object to be sent instead of a
DocBlock.

We should research why this happens but for now we'll use this
workaround.
Replace Zend\Cache with Desarolla\Cache

Zend Cache was overkill for our use case and imports to many
dependencies that we do not want. As such i have replaced it with
Desarolla\Cache, which is more lightweight and offers a similar
functionality.
Merge branch 'develop' of github.com:phpDocumentor/Reflection into develop

Conflicts:
	composer.lock
Update composer lock file