Geosci-Labs dependency

Follow the geosci-labs repository for maintaining the notebooks. The maintenance strategy now follows that outlined in geosci-course

Commits: @lheagy , @thast
Reviewer: @thast

• the .jupyter-include file contains the list of notebooks that we copy-over from geosci-labs
• now the code that is imported is geosci-labs
• many thanks @orerocks and @AlainPlattner for pointing out that this repo is lagging behind!
• This resolve #108, #109