removed option to remove mesh nodes at nodata values, added default value at nodata values instead
changed dialog so that replacement value can be set from gui
changed static thickness default and do not insert layers with thickness = 0
for multi-layer meshes default values are now set to the node directly above, default value for top layer is set to zero (this might be a problem)
Merge pull request #279 from bilke/travis-vtk6

Use a precompiled VTK-6 on travis
cleaned up the class a bit and fixed a bug
fixes based on PR comments
Merge pull request #278 from rinkk/NoDataReplacement

No data replacement for mesh layer mapping
One more fix for netcdf include errors when building VTK locally.
Merge pull request #280 from bilke/vtk-cmake-fix

One more fix for netcdf include errors when building VTK locally.
Fixed warnings "unused variable" in GeoMapper.
Fixed warning related to the sequence of attributes in initializer list.
Fixed warning unused variable in ElementExtraction::searchByBoundingBox().
Fixed warning "comparison between signed and unsigned" in GeoTreeModel::setNameForItem().
Fixing unused parameter in MeshElementRemovalDialog::on_meshNameComboBox_currentIndexChanged().

The parameter is necessary due to a fixed signature in Qt signal concept.
Prevent compiler error in case Eigen is not available.
Merge pull request #281 from TomFischer/StNicholasWarningsFixDay

St nicholas warnings fix day
Correctly package linux shared libraries.
This installs a startup script for the Data Explorer on Linux.

The scripts set the search path for shared libraries to the bin
directory (LD_LIBRARY_PATH). The script is bundled into the tar
archive when packaging.
Merge pull request #285 from bilke/linux-redistributable

Get the linux redistributable of the Data Explorer finally working ...