Intpython 713 pushdown condition#3

WaVEV wants to merge 4 commits intomainWaVEV/django-mongodb-backend:mainfrom

INTPYTHON-713-Support-pushdown-of-simple-negated-filters-to-$lookupWaVEV/django-mongodb-backend:INTPYTHON-713-Support-pushdown-of-simple-negated-filters-to-$lookupCopy head branch name to clipboard