feature/windVectorRefactoring

Outsourced the wind velocity vector calculation. All common filters now do not handle vector calculations anymore and the reader does not output wind vectors either. As a replacement, a dedicated filter that computes and adds the wind velocity vector array has been added. This has the advantage of keeping all of those computations in one place and not having to recalculate the vectors all the time after operations like interpolation or aggregation.
Added more possible data types to all filters. Instead of only accepting vtkPolyData, they now also accept vtkPointSet and vtkUnstructuredGrid. For example, this enables the user to extract a data selection using ParaView's eponymous filter and use that as an input for one of Kronos's filters which was not possible before.

frogg / STUPRO