Rewrite README in the style of my other packages

Fix typo in README

Bump version to 0.2.1 for GNU ELPA

Assign copyright to the FSF

Relicense face-shift under GPL-3

Update screenshot

Increase default face-shift-intensity value

Replace use-package with setup

Lower minimal version to 24.1

Remove subr-x dependency

Remove cl-lib dependency

Bump version to 0.2.0

Update author header

Remove font-lock faces from face-shift-faces

Fix checkdoc issues

Update face-shift-shifts

Always require cl-lib

Generalize face-shift-intensity type

Update face-shift documentation

Add face-shift-shift-foreground option