- deleted most old libraries/headers in codepit to avoid confusion (they
are now in SVN anyway). updated required-libraries-linux.txt accordingly
- moved rand() into separate file, out of lib.cpp
- removed CGUIScrollBarStyle.cpp to avoid empty-file warning
- wxwidgets.h: remove redundant #pragma lib and include wxw PCH
- move openal-specific stuff to external_libraries/openal.h
- cpu, bsd: macosx is-a bsd, so only test OS_BSD
This was SVN commit r5082.
