need the MaterialLibrary class on the dataserver too
otherwise, we get SIProxy shouldn't be null assert failures in the client+renderserver+dataserver tests where dataserver tries to instantiate the state.
note: this has been broken since PV 5.5.0
otherwise, we get SIProxy shouldn't be null assert failures in the client+renderserver+dataserver tests where dataserver tries to instantiate the state.
note: this has been broken since PV 5.5.0