UnionOfRAD/lithium — pull request #341 by kalnado (2012-02-20 10:11:18+00:00)
Title: MongoDB: allow for $and and $nor conditional operators

Updated data/source/MongoDb.php to allow the use of $nor and $and ($and is new since Mongo 2.0). http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24nor

Added tests, shoudn't break anything.

(this is a resubmit of #331 against data branch)