added CSS best practices resource
added CSS best practices resource
bounceflick/bounceflick.github.io,spookysalsa/medermade.github.io,PLopezD/plopezd.github.io,davidckim/davidckim.github.io,spookysalsa/medermade.github.io,PLopezD/plopezd.github.io,PLopezD/plopezd.github.io,PLopezD/plopezd.github.io,davidckim/davidckim.github.io