Version 2

[cphillips83]

https://github.com/MindMatrix/MongoRepository2

Putting this here in case someone may find it useful, the code was taken from sidecut's https://github.com/sidecut/MongoRepository/tree/v2.4.2 as the base rather than here since it seemed to be the most complete.

• I implemented .NET Core, .NET Standard and .NET 4.5
• I implemented the async pattern for all interfaces
• I removed some ObjectId methods since they defeated the purpose of TKey
• I removed the manager code from the repository tests and added a separate set of tests for this class
• I created an InMemoryRepository so that my external project doesn't need to hit the MongoDB during unit tests
• Collection names for the most part are randomized (except for the few tests that require a specific name). This was needed since the tests run across 3 different .NETs.