With this commit 'xatrix' is cleaned up. Every single line was audited,
many bugs removed and hundered of sanity checks added. Additionally the
code was reformated. All in all 'Xatrix' should now be much more
reliable and for the first time in ~15 years completeable without any
crashes, logic bugs or the like. Until now about 130 hours spread over
more than a year were spend for this project.
Of course this code is totaly untested. The next step is testing,
testing and testing. After that the spawn points needs to be fixed
so that all maps can pe started by "map $mapname".
