working on changing Belastungsstufe by Test

git-svn-id: https://dbis-informatik.uibk.ac.at/svn/snowprofile/trunk/code@183 b0e66d11-08a8-0410-84da-a809a5ca4a2f
working on graph

git-svn-id: https://dbis-informatik.uibk.ac.at/svn/snowprofile/trunk/code@184 b0e66d11-08a8-0410-84da-a809a5ca4a2f