Add new HEs

Author: chaselivingston

readme.md

@@ -45,7 +45,7 @@ Legacy contributions (that may not be credited properly due to the import from S
 * @xyu
 * @yoavf
 
-Our _awesome_ happiness engineers are @jeherve, @richardmtl, @csonnek, @rcowles, and @kraftbj
+Our _awesome_ happiness engineers are @jeherve, @richardmtl, @csonnek, @rcowles, @kraftbj, @chaselivingston, @jenhooks, @aheckler, and @mikeyarce
 
 Interested in working on awesome open-source code all day? Join us!