Fix travis for python 3.2
Fix travis for python 3.2

sourcelair/mongoengine,touilleMan/mongoengine,cogniteev/mongoengine,ProgressivePlanning/mongoengine,Davidrjx/mongoengine,Davidrjx/mongoengine,cogniteev/mongoengine,MakerReduxCorp/mongoengine,larsbutler/mongoengine,MongoEngine/mongoengine,ConsumerPhysics/mongoengine,MakerReduxCorp/mongoengine