Use SetPoint instead of InsertPoint() when number of points is known.
Replaced InsertNextXXX() with SetXXX() where possible.

Added some more VtkPolyData::Squeeze()-calls.
Maybe VtkStationSource and VtkConditionSource can be optimized further.
Replaced InsertNextXXX() with SetXXX() in VtkStationSource where possible.
Merge pull request #212 from bilke/VTK-Optimizations

Some VTK optimizations in the Data Explorer