V2.1.0 - Pre-approved version

Pre-release version of the Box and Whisker chart.

Release notes:

• [NEW] Add 'sampling' details to tooltips [#3]
• [NEW] Add changing category axis label orientation [#5]
• [NEW] Support for highlighting
• [BUG] Changing data colors [#4]
• [BUG] Outlier tooltips incorrect values [#7]
• [BUG] In certain situations incorrect visuals are drawn [#8]