More examples

[rbaheti]

Description

closes#133

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have documented all new methods.
• I have written tests for all new methods/functionality.
• I have written examples for all new methods/functionality.

Checklist of new examples

• Scatter Plot grouping
• Line Plot Grouping
• Hiding Tooltip
• Change Box and Whisker mode

[davelandry]

Make into one paragraph:

The "mode" of a Box and Whisker plot changes the placement of the extent of the whiskers. The [`BoxWhisker`](http://d3plus.org/docs/#BoxWhisker) class defaults to using the "[tukey](https://en.wikipedia.org/wiki/Box_plot#Variations)" method, but this can be changed by setting the `whiskerMode` property of the [`Box`](http://d3plus.org/docs/#Box) shape class using [shapeConfig](http://d3plus.org/docs/#Viz.shapeConfig). Accepted values are `"tukey"`, `"extent"`, or an Array of 2 numbers used as the bottom and top percentile.

Also, double check me on that description of using 2 numbers 👆

[rbaheti]

Description is correct, but passing array of numbers is breaking the code. Will try to fix it.