Updated references in README.md
Merge branch 'master' of https://github.com/ajlopez/SharpMongo
Merge branch 'master' of https://github.com/ajlopez/SharpMongo
Merge branch 'master' of https://github.com/ajlopez/SharpMongo
Merge branch 'master' of https://github.com/ajlopez/SharpMongo
Merge branch 'master' of https://github.com/ajlopez/SharpMongo