qt5 apps support

git-svn-id: http://openmesh.org/svnrepo/OpenMesh/trunk@1103 fdac6126-5c0c-442c-9429-916003d36597
fix error message and condition

git-svn-id: http://openmesh.org/svnrepo/OpenMesh/trunk@1104 fdac6126-5c0c-442c-9429-916003d36597
Updated changelog for release



git-svn-id: http://openmesh.org/svnrepo/OpenMesh/trunk@1105 fdac6126-5c0c-442c-9429-916003d36597
remove qtwidgets dependency

git-svn-id: http://openmesh.org/svnrepo/OpenMesh/trunk@1107 fdac6126-5c0c-442c-9429-916003d36597