obspy set problem

[pavlis]

I think this is not our problem, but an obspy problem. I was going to use the plot features of their 'catalog" and "Inventory" objects but discovered they failed with a package missing error. The package is called "cartopy". In the contaier i did a pip install cartopy and the error disappears. We can solve this problem easily by adding cartopy in the docker build. A minor issue but also one easily solved.