Updated some URLs to https

README.md

@@ -72,8 +72,8 @@ External supporting projects - **outside of this organization**:
 
 #### Jupyter Notebooks
 
-* We recommend trying Tablesaw inside [Jupyter notebooks](http://arogozhnikov.github.io/2016/09/10/jupyter-features.html), which lets you experiment with Tablesaw in a more interactive manner. Get started by [installing BeakerX](http://beakerx.com/documentation) and trying [the sample Tablesaw notebook](https://github.com/twosigma/beakerx/blob/master/doc/groovy/Tablesaw.ipynb)
-* A second way to use Tablesaw inside [Jupyter notebooks](http://arogozhnikov.github.io/2016/09/10/jupyter-features.html) is with [IJava](https://github.com/SpencerPark/IJava), which has built-in support for Tablesaw. Gary Sharpe has written [an excellent tutorial](https://medium.com/@gmsharpe/java-jupyter-plotly-e1bbaa7f2be8) that shows you how to use Tablesaw plots. Gary has written a number of other tutorials that feature Tablesaw:
+* We recommend trying Tablesaw inside [Jupyter notebooks](https://arogozhnikov.github.io/2016/09/10/jupyter-features.html), which lets you experiment with Tablesaw in a more interactive manner. Get started by [installing BeakerX](http://beakerx.com/documentation) and trying [the sample Tablesaw notebook](https://github.com/twosigma/beakerx/blob/master/doc/groovy/Tablesaw.ipynb)
+* A second way to use Tablesaw inside [Jupyter notebooks](https://arogozhnikov.github.io/2016/09/10/jupyter-features.html) is with [IJava](https://github.com/SpencerPark/IJava), which has built-in support for Tablesaw. Gary Sharpe has written [an excellent tutorial](https://medium.com/@gmsharpe/java-jupyter-plotly-e1bbaa7f2be8) that shows you how to use Tablesaw plots. Gary has written a number of other tutorials that feature Tablesaw:
   * [Tidy Data with Java & Jupyter](https://medium.com/@gmsharpe/tidy-data-with-java-jupyter-b1e131b37ab0)
   * [Dataframes with Tablesaw — JSON](https://medium.com/@gmsharpe/dataframes-with-tablesaw-json-46dda9c8c217?source=your_stories_page----------------------------------------)
   * [Dataframes with Tablesaw — CSV Files](https://medium.com/@gmsharpe/importing-data-with-tablesaw-part-1-csv-files-3ac6f135cf6f?source=your_stories_page----------------------------------------)