Updated contributors

Author: nzakas

README.md

@@ -26,4 +26,10 @@ CSSLint is a tool to help point out problems with your CSS code. It does basic s
 1. Damien Sennm, https://github.com/topaxi (README fixes)
 1. Jonathan Barnett, http://twitter.com/indieisaconcept (JUnit formatter)
 1. Zach Leatherman, http://www.zachleat.com/ (bug fixes)
-1. Philip Walton, http://philipwalton.com (Rules fixes, bug fixes)
+1. Philip Walton, http://philipwalton.com (Rules fixes, bug fixes)
+1. Jeff Beck, http://www.jeffbeck.info (Rules fixes, bug fixes)
+1. Jay Merrifield, https://github.com/fracmak (Rules fixes)
+1. Michael Mattiacci, http://mattiacci.com (Rules fixes)
+1. Jonathan Klein, http://www.jonathanklein.net (Bulletproof font-face rule)
+1. Shannon Moeller, http://shannonmoeller.com (Embedded rulesets)
+1. Nick Schonning, https://github.com/nschonni (Contributing.md)