#40 Spatial join intersection parallel error and other fixes

Closes #40

See merge request !56

#20 Cell area

See merge request !55

Fixed error while getting the reading axis limits

See merge request !54

#3 Shapefile

See merge request !52

# Conflicts:
#	tests/3-test_spatial_join_nord3v2.bash

#2 Update coordinates bounds

See merge request !50

#36 Replace wrong paths in tutorials

See merge request !49