Add custom scss-lint config
scss-lint: prefer lowercase hex
Set up pre-commit configuration
Add pre-commit instructions

Conflicts:
	README.md
scss-lint: Properties should be sorted in order
Ensure all assets get gzipped for performance
Merge branch 'master' into bootstrap

Conflicts:
	app/assets/stylesheets/base.css.scss
	app/assets/stylesheets/globals/_variables.css.scss