Changes to http://gnuskola.purp.cz (for testing purposes).
Merge branch 'ut2' into purp
Merge branch 'ut2' into purp
Merge branch 'ut2' into purp
Merge branch 'ut2' into purp
added case 'sitemap': ..
navigation bar changed, name of some materials/projects changed
urls for materialy,projekty changed in nav
added '/' to all paths..
minority changes in footer