Fix width and height behaviour
Unify/simplify denomination of 'toolbar'
Rework and update 'contact'-site
"Rework 'teachings'-site"
Rework 'python'-site
Rework the 'processing'-site
Rework 'templates'-site
Rework 'webmapping'-site
Rework 'publication'-site
Clean main homepagestyle
Change styling behaviour of background (main and iframe)
Fixes for cross-browser validity