Fixes #201.

This is really a UX issue.

Previously, if any datapoint was a zero-value, it would still be visible on the chart, making it seem it has non-zero data.

P.S. I wasn't able to run the contribution steps locally, so I have no idea how to rebuild the distribution(s). That might need a separate commit/PR.

Home Page

Update README.md

`datasets` have `name`, not `title`

Develop

Setup Unit Testing and Coverage

[NEW] Add Version Constant to export

Piechart could not render large arcs (>180) properly because the
information of large arc was not provided to the SVG drawing
function. This was fixed, and the piechart should render
correctly when one slice is larger than 180 degrees.