Sci-analysis

Scatter plot line fits were always being displayed as positive even if the correlation was negative.

* The documentation is now generated from a Jupyter notebook instead of a standalone rst file.
* Fixed a bug that was causing a FutureWarning to be displayed anytime an unstacked group stats was performed.

* Version 2.1 makes improvements to Statistical output and plots.
* Tukey-Kramer circles were added to the Oneway analysis plot.
* Grand Mean and Grand Median were added to the Oneway analysis plot.
* Overall Statistics were added to Oneway analysis.
* Overall Statistics were added to Categorical analysis.
* The Categorical analysis graph was changed to improve the appearance.

Changed how Grand Median is calculated in group Overall Stats