Update tutorials for Port Barcelona and CSIC

See merge request !40

Add CSIC example

See merge request !39

Solved bug on Vertical interpolation when order of new levels is different from the old ones (ascendant vs descendant)

BDRC improvements

See merge request !38

- Added sum_axis function
- Modified grib2 function

Develop 13 selecting function

See merge request !37

Fix bug related to coordinate bounds

See merge request !36

Move lat lon spatial nv dimension creation to default

See merge request !35

Fix Providentia interpolation

See merge request !34

Create points shapefiles

See merge request !33

Update functions to create shapefiles

See merge request !32

#3 Implement to_shapefile, update tutorials and correct bounds

See merge request !31

Remove code related to coordinate bounds in points NES

See merge request !30

Rename tutorial to 1.6

See merge request !29

Update tutorials and clean code

See merge request !28