Adding drifter data tutorial to virtualship docs (#92)

* Adding drifter data tutorial to virtualship docs

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Add "nbsphinx-thumbnail" cell-tage to trajan plot for readthedocs tile

* Adding starting locations as red dots to Drifter map

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: erikvansebille

docs/tutorials/Drifter_data_tutorial.ipynb

@@ -3,5 +3,5 @@
 ```{nbgallery}
 ADCP_data_tutorial.ipynb
 CTD_data_tutorial.ipynb
-sciencecommunication_assignment.ipynb
+Drifter_data_tutorial.ipynb
 ```