Animate cross section

[OnnoEbbens]

Add method to animate a cross section

[rubencalje]

Looks good! Some items could be made optional, like the colorbar and the title, but that can also be changed later.

It would be great if you can add a small test.

[OnnoEbbens]

Ik zal een voorbeeld toevoegen aan een notebook omdat ik dan alle data heb om een animatie te maken. Ik probeerde dit net maar het lijkt alsof de regis netcdf (tijdelijk) offline is. Ik krijg deze error:

OSError: [Errno -68] NetCDF: I/O failure: b'[http://www.dinodata.nl:80/opendap/REGIS/REGIS.nc](http://www.dinodata.nl/opendap/REGIS/REGIS.nc)'

[OnnoEbbens]

It seems like the old URL works again: https://www.dinodata.nl/opendap/hyrax/REGIS/REGIS.nc

[OnnoEbbens]

I have the feeling that the appropriate URL depends on the package versions I am using. So I did not change anything there

[rubencalje]

I have the feeling that the appropriate URL depends on the package versions I am using. So I did not change anything there

Strange that it is working in your latest commit, but not in other pull requests after that....