Add img/ to task bundle; clean up folder

.gitlab-ci.yml

@@ -5,7 +5,7 @@ pages:
   stage: deploy
   script:
   - mkdir public
-  - tar czf public/pandas-tutorial-tasks.tar.gz --transform 's,^,pandas-tutorial-tasks/,' Introduction-to-Pandas--tasks.ipynb Introduction-to-Pandas--solution.ipynb data-lost.json data-nest.csv
+  - tar czf public/pandas-tutorial-tasks.tar.gz --transform 's,^,pandas-tutorial-tasks/,' Introduction-to-Pandas--tasks.ipynb Introduction-to-Pandas--solution.ipynb data-lost.json data-nest.csv img/
   - cp Introduction-to-Pandas--slides.ipynb public/
   - cp Introduction-to-Pandas--slides.pdf public/
   - cp static-slides-bundle.tar.gz public/pandas-tutorial-slides-bundle.tar.gz