examples: Revamp GemPy notebook

[EdCaunt]

Supersedes #2059

[review-notebook-app[bot]]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 86.67%. Comparing base (2f27c9d) to head (2ed911f). Report is 11 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2320   +/-   ##
=======================================
  Coverage   86.67%   86.67%           
=======================================
  Files         229      229           
  Lines       43107    43107           
  Branches     7996     7996           
=======================================
  Hits        37365    37365           
  Misses       5048     5048           
  Partials      694      694           

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[FabioLuporini]

closed #2059