granovaGG 1.4.0

Minor Changes

• Added a NEWS.md file. (Hello, world!)
• Remove calls to unit(), which will help address issues like #164
• Stop importing datasets from MASS; instead put them directly in the package and document them locally

Bug Fixes

• Fixed a typo on an alpha parameter in granovagg.ds that was giving unneeded grief. Many thanks to Jeremy Gray ([@jeremycg](https://github.com/jeremycg)) for raising the issue
• Fix bugs related to drawing CI Band, crossbow, trails, and shadows in granovagg.ds