add support for subqueries (Subquery, Exists, and QuerySet as a lookup value)#149

timgraham merged 2 commits intomongodb:mainmongodb/django-mongodb-backend:mainfrom

WaVEV:add-support-to-subquery-expressionsWaVEV/django-mongodb-backend:add-support-to-subquery-expressionsCopy head branch name to clipboard