Added spectral to dependencies. Added many functions from arosics:

- dtypes.convertGdalNumpyDataType()
- geo.get_coord_grid()
- io.raster.gdal.wait_if_used()
- io.raster.reader.init_SharedArray_in_globals()
- io.raster.reader.fill_arr()
- io.raster.reader.gdal_read_subset()
- io.raster.reader.gdal_ReadAsArray_mp()
- io.raster.writer.write_numpy_to_image()
- io.raster.writer.write_envi()
- io.raster.writer.init_SharedArray_on_disk()
- io.raster.writer.fill_arr_on_disk()
- io.raster.writer.convert_gdal_to_bsq__mp()
- io.vector.writer.write_shp()