This adds RTKit support to VICE. If it is not explicitly disabled during
autoconf, we will check for D-Bus, then if D-Bus is found, RTKit will
be used to attempt elevate the VICE main process to realtime scheduling
at RT priority 4. If that fails, it will back down priorities or request a high
nice level (also using RTKit) if realtime fails altogether.
This makes running VICE considerably smoother on this Fedora 13
machine at least.
Based on Lennart Poetterings RTKit example code (BSD licensed).