Fix CMake dependency problem.
Fix some more compiler complaints.
Updated web link to project.
Struggling with mod files.

The mod files for the threaded and the serial versions are apparently
different. At the very least they differ in the qutree:lock field, which only
exists if compiled with OpenMP. I am not sure if other differences exist. My
attempt to write serial and a threaded mod versions failed. CMake doesn't
understand where the mod files are now and the build fails...