Features:
* network core is dynamicly loaded when needed (-n isn't needed anymore)
for easy switching between single and multiplayer. But commandline
shortcuts are still enabled:
-n = autodetect network server
-n [ip] = connect to the server
* udp now uses 2 different ports
- you can run 1 server and serveral clients on one pc
- the clients udp-socket gets unloaded when the
network game starts
- the servers udp-sockets remains online to allow the
network gui to detect itself
* new gameinfo structure
this struct is available for every online/lan game
* dynamic NetworkGameList
