This is required for the substitution of different HTTP servers or the newer HttpServer.dll without having to commit to a particular implementation.
This is also required to write regression tests that involve the HTTP layer.
If you need to recompile, all you need to do is replace OSHttpRequest/OSHttpResponse references with IOSHttpRequest/IOSHttpResponse.
* unfortunately, while the client requires uuids and we want to be able to have arbitrary string ids, these cannot be kept in sync
* I think the problems last time were due to a serialization change
* So the major inteface version has been bumped to take care of any lingering issues here.
* This means that region servers beyond this revision can only connect to similarly uptodate grid services, and vice versa
