Networking improvements..

While creating networking code tests I found some bugs and some code that was not expedient. Fx. the acknowledgement of reliable UDP packages has been moved into the net library where it belongs. I also got some ideers to improve the net layer, but that is not important right now since it does fulfill our requirements for now very well.

One of the bugs discovered actually required me to touch nearly all the game code. I had to create a Time type instead of using the Real type. This is because Real may be defined as float and not as double, and a float only gives about 8 decimals precision. That is not enough for specifying absolute time, thus time variables should be guaranteed to be doubles. I have committed the corrections to svn and am looking forward to update on windows to see if it solves the retransmit problem on that platform.

I've get feedback from both the modeller and the audio dudes I contacted regarding making some content. They are both interested in doing some work and I'm looking forward to receive some of their works.