Update README instructions
Adhere to colon separations between prop/val Stylus style convention
Convert padding variable to pad as Stylus style convention
Remove image from edit() mixin as Stylus lib ver of Jeet won't support
Update package.json for Jeet 4 npm distribution
Add jeet.js Stylus library file
Add .gitignore
Convert all @extends to @extend for the sake of consistency
Make center() mixing pad = 0 by default
Add CHANGELOG.md