CSHARP-1128: Accelerate heartbeats when SelectServerAsync can't find a suitable server.
CSHARP-1128: Added tests for HeartbeatDelay.
CSHARP-1106: Added MongoCursorNotFoundException, MongoIncompatibleDriverException and MongoWaitQueueFullException.
converted build script to FAKE. This allowsconverted build script to FAKE. This allows it to run in both windows and linux environments. In addition, removed installer support and broke out nuget packaging into multiple packages.