SicariusFeroxis

Added UT2003 (Demo) working with openspy as well.

1

The demo was released on Linux/Windows in 2002, updated several times and a lively community kept playing the demo only for years. [More info and win32 binary here](https://github.com/SicariusFeroxis/ut2003demo/releases/tag/ut2003demo_v2206)