The only place using scalar product from MathTools.

Include spdlog via BaseLib/Logging.h, which
provides macro replacements for
ERR/DBUG/WARN/INFO...

Clang format run on near-the-header lines.

Happy New Year

* reimplemented raster to mesh conversion

* fixed index issues and added 3d index calculation

* added necessary changes to gui dialogue

* added tests

* clang format

* added ifdef for data explorer/vtk includes

* modified dereferencing of unique pointers, formatting

* changed pointer to vector in vtk prep

* using const& for nodes vec

* fixed remaining occurences of dereferencing raster object

See clang-tidy docu https://clang.llvm.org/extra/clang-tidy/checks/readability-simplify-boolean-expr.html

Especially on iterator types and 'new' allocations.

Carry out the double arithmetics until the index access, which is checked for conversion.