* added hint to aggregate
* added support for hint in query
* added else clause to aggregate
* fixed tests
* updated tests
* Add tests and clean up
* Add support for explain
Co-authored-by: Diamond Lewis <findlewis@gmail.com>
* Support for Aggregate Queries
* improve pg and coverage
* Mongo 3.4 aggregates and tests
* replace _id with objectId
* improve tests for objectId
* project with group query
* typo