Updated README

Author: Christian Amor Kvalheim

README.rdoc

@@ -36,6 +36,23 @@ A simple example of inserting a document.
 	});
  });
 
+= Important
+
+The version V0.8.0 > contains a C/C++ native BSON parser, this leads to some small changes in the way you need to access the
+BSON classes as you need to use the right versions of the classes with the right driver.
+
+For the existing javascript driver please reference BSON via
+
+BSON = require('./mongodb').BSONPure
+
+or when using the native bson parser use
+
+BSON = require('./mongodb').BSONNative
+
+To enable the driver to use the C/C++ bson parser pass it the option native_parser:true like below
+
+var client = new Db('integration_tests_20', new Server("127.0.0.1", 27017, {native_parser:true}));
+
 === GitHub information
 
 The source code is available at http://github.com/christkv/node-mongodb-native.