CSHARP-930: Handle dictionary keys with null characters.
rewrote the readme.
CSHARP-797: Change unit tests affected by server version 2.6.0-rc2.
CSHARP-941: Change default GridFS chunk size from 256KiB to 255KiB.
CSHARP-942: Throw a NotSupportedException if the Exhaust query flag is used.
Change all versions numbers in the code to production version numbers. Also, standardize on 3-component version numbers.
Merge branch 'master' of https://github.com/mongodb/mongo-csharp-driver