Support filter parameters in configuration

Depends on https://github.com/doctrine/mongodb-odm/pull/908, which allows filter parameters to be set in the ODM's Configuration class (slated for 1.0.0-BETA12).

This PR supersedes #255, and includes a commit from @bigfoot90.

Bundle documentation should ultimately link to the ODM's own documentation for creating Filter classes, which is pending in https://github.com/doctrine/mongodb-odm/pull/899.