Break ZF dependency on query construction API

Currently (2.0 API), Search Lucene API relies on the Zend Framework's object oriented query construction API. By implementing a query API as an array, we can not only remove the need for hook_luceneapi_query_rebuild(), but we can also make the API more accessible to the Drupal community and pave the way for Java Lucene integration. Furthermore, hook_lucene_api_query_alter() will provide access to every part of the query.