Remove mesh lib on file io dependency

Simplify concrete processes

Use instead layered mesh constructor taking a GeoLib::Raster.
Reading of the raster happens inside the application now.

Add parsing of piecewise linear curves.

The constructor performed two things simultaniously,
which is not good for a ctor: Constructing the object
and calculating the values at given points.

If needed such code should be moved to a standalone
algorithm.

This way an expensive copy must be performed by the
caller and is not hidden in the ctor.

Reasoning: The vector's move operation is cheap and it covers the two cases of
passed l-values and r-values w/o code duplication and templates.

According to "Effective modern c++" Item 41: "Consider pass by value for
copyable parameters that are cheap to move and always copied."

Thereby one does not use LocalAssemblerInterface in two different fashions
inside one concrete process. That's a little bit more streamlined. On the other
hand now the interface is passed as complete type, but the implementation is
passed as template-template. That's less streamlined.

output parameters are not to passed as array of addresses anymore.

Cleanup and remove warnings

Cleanup and remove warnings