set positions of layer

git-svn-id: https://dbis-informatik.uibk.ac.at/svn/snowprofile/trunk/code@185 b0e66d11-08a8-0410-84da-a809a5ca4a2f
working on graph

git-svn-id: https://dbis-informatik.uibk.ac.at/svn/snowprofile/trunk/code@186 b0e66d11-08a8-0410-84da-a809a5ca4a2f
working on graph

git-svn-id: https://dbis-informatik.uibk.ac.at/svn/snowprofile/trunk/code@187 b0e66d11-08a8-0410-84da-a809a5ca4a2f
first version of snowprofile graph

git-svn-id: https://dbis-informatik.uibk.ac.at/svn/snowprofile/trunk/code@188 b0e66d11-08a8-0410-84da-a809a5ca4a2f