* Binary writer/reader: add writeCString and readCString.
* MongoDB::Database: add queryBuildInfo and queryServerHello; add WireVersion enum.
* MongoDB: Introduce OpMsgMessage (request and reply) and related changes in Connection, Database, MessageHeader.
* MongoDB: First unit test changes for OpMsgMessage.
* MongoDB::Document: new functions addNewArray and remove.
* MongoDB: OP_MSG unacknowledged write and many improvements
* MongoDB: new cursor using OP_MSG
* MongoDB: bunch of new tests for OP_MSG wire protocol.
* BinaryWriter::WriteCString: use write instead of operator <<.
* MongoDB::OpMsgCursor: Slightly modified prototype code for using moreToCome flag.
* MongoDB: Add OpMsg* files to Makefiles.
* MongoDB: Add OpMsg* files to VS project files.
* Compile fixes.
* MongoDB::Database: Add factory function for database commands createOpMsgMessage() and cursors createOpMsgCursor()
