No development time debugging output by default
Changed the way mcetool --set-demo-mode works

Now that mce utilizes builtin-gconf and mcetool can make changes
to settings again, there should be no need for the demo mode hack
anymore and we can make --set-demo-mode option just a shortcut for
several normal mcetool options.
Enable and document short command line options for mcetool
Removed config for unsupported --modinfo mcetool command line option
Merge pull request #21 from spiiroin/demo_mode

Support for short mcetool command line options and changes to --set-debug-mode handling