Change BSONReader and BSONWriter to BsonReader and BsonWriter in all comments
GetIndexesOperation Javadoc improvements
Renamed CodecSource to CodecProvider, and changed suffix for all implementations as well.
Added missing BsonDocument and BsonValue methods, and added test specs for both classes
Added missing Javadoc in BSON-related classes.
AbstractBsonReader.isClosed now protected, to match AbstractBsonWriter
BsonBinaryWriter.Context now protected