Added a stub for the PrototypeRegistry, which will hold sets of Components which can be instantiated in the World.
Added a Util.h file, currently containing DLL export stuff and an asynchronous thread-safe logger (which presently outputs to cerr).
Moved the testing files to it's own project, which can be built separately. (Relies upon the Debug (Dynamic) build of ECS and the static release build of the cppunitlite stuff.)