Fix bug when reading vtu-mesh referenced in OGS project file.
Merge pull request #294 from TomFischer/BugFixReadingMeshesDeployingProjectFiles

Fix bug when reading vtu-mesh referenced in OGS project file.
removed comment
Merge branch 'master' of https://github.com/ufz/ogs
fixed a bug where selecting a mesh node for visualisation would crash the programme (due to vtk5 to vtk6 transition)
Fixed stupid eigen not downloadable error by moving eigen onto another website.