Threedigrid-builder

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- Fixed extracting EPSG code from outdated CRS WKT definitions.

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- Disable tests for CI Build Wheel, because GDAL is not included on build machine.

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- Write the WKT of the CRS (in addition to the epsg code) into the gridadmin.

- Drop rasterio as optional raster interface.

- Append / prepend coordinates to channel/culvert linestrings if they do not intersect
the connection nodes they are attached to.

- Only give node_type 4 and kcu 52/54 to manholes with a not-NULL storage area.

- Use pygoes to calculate grid refinements.

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- Store epsg_code as string in GridMeta.

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- Interpret non-finite raster values (NaN, Inf, -Inf) as nodata.

- Use GDAL (instead of rasterio) for reading rasters, if present.

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- Write "grid_coordinate_attributes" also for pure 1D models.

- Make requesting spatial reference of GDAL dataset compatible with GDAL 2.x.

- Fix: do not ignore (Impervious)Surface records without geometries. These surfaces
will get their location from their connection node.

- Do not ignore invalid geometries (surfaces, grid refinement areas, dem average areas)