add more info for activities; update caps chair (#102)

Author: yqtianust

content/activities/overview.md

@@ -17,7 +17,8 @@ Here is a non-exhaustive list of them.
 
 
 Here is a list of new initiatives that SIGSOFT is exploring, and the corresponding committees that are leading them:
-- SIGSOFT history committee: Will Tracz, Tony Wasserman, Luca Di Grazia, Yun Peng, Thomas Zimmerman, Massimiliano Di Penta, Marsha Chechik
-- SIGSOFT ACM Digital Library liaisons: Xiaoning Du and Tao Zhang
-- SIGSOFT conference program committee member recognition coordinators: Sylvain Hallé and Yepang Liu
-- Research Highlights coordinator: Silvia Abrahão
+- SIGSOFT History Committee: Will Tracz, Tony Wasserman, Luca Di Grazia, Yun Peng, Thomas Zimmerman, Massimiliano Di Penta, Marsha Chechik. The committee will build and maintain an archive of SIGSOFT-relevant historical information, including developing relevant wiki pages. 
+- SIGSOFT ACM Digital Library liaisons: Xiaoning Du and Tao Zhang. The liaisons will ensure that information about SIGSOFT (co)-located events has been correctly captured in ACM Digital Library.
+- SIGSOFT Conference Program Committee Member Recognition Coordinators: Sylvain Hallé and Yepang Liu. The coordinators will create and mail personalized digital certificates for program committee roles of SIGSOFT (co)-sponsored conferences.
+- Research Highlights coordinator: Silvia Abrahão. The coordinator will work with program chairs of SIGSOFT (co)-sponsored conferences to identify most promising papers for possible publication in Communications of the ACM.
+

content/execcontact.md

@@ -128,10 +128,10 @@ title = "SIGSOFT Executive Committee"
     Carnegie Mellon University, USA
     [email protected]
 
-#### CAPS Co-Chair: Nan Niu
+#### CAPS Co-Chair: Istvan David
 
-    University of Cincinnati, USA
-    [email protected]
+    McMaster University, Canada
+    [email protected]
 
 #### CAPS Co-Chair: Zhiyuan Wan