Moved src/libqhull/Makefile.txt to Makefile
- Added libqhullp, libqhullcpp, user_eg3, qhulltest to Makefile
- Build: Removed -frtti from gcc build
- Build: Comment out -Werror
- Removed semicolon after extern "C" {...}
- Renamed parameters, locals, and fields to avoid shadowing
- Updated test programs for new location of bin/qhull
- Removed unused QhullEvent/QhullLog