ggfocus 0.81

• Added a NEWS.md file to track changes to the package.
• Included scale_*_focus() functions for color, alpha and fill aesthetics.
• Improved error messages.

ggfocus 1.0.0 (2019-12-23)

• ggfocus() is now deprecated. scale_*_focus() should be used.
• Focus scales added for size, linetype and shape.
• Documentation for all focus scales are now available in a single help file. Use ?scale_focus to view usage and examples.