committee.md

@@ -26,6 +26,7 @@
 -  Simon Thompson \<S.J.Thompson at kent.ac.uk\>
 -  Malcolm Wallace \<Malcolm.Wallace at cs.york.ac.uk\>
 -  Stephanie Weirich \<sweirich at cis.upenn.edu\>
+-  Duncan Coutts \<duncan.coutts at worc.ox.ac.uk\>
 
 ## Misc.