Enhancement/update to sensormapgeo 1.0.0

This updates the orthorectification module to use the GDAL backend of sensormapgeo 1.0.0 which speeds up the orthorectification a lot and makes all GDAL-supported resampling techniques available for EnPT.

Closes #58 (closed).

enpt/processors/dem_preprocessing/dem_preprocessing.py

@@ -127,7 +127,7 @@ class DEM_Processor(object):
     def to_sensor_geometry(self,
                            lons: np.ndarray,
                            lats: np.ndarray):
-        GT = Geometry_Transformer(lons=lons, lats=lats, nprocs=self.CPUs)
+        GT = Geometry_Transformer(lons=lons, lats=lats, backend='gdal', resamp_alg='bilinear', nprocs=self.CPUs)
         data_sensorgeo = GT.to_sensor_geometry(self.dem)
 
         return GeoArray(data_sensorgeo)