Add David Clemens-Sewall and Bin Zhao to zenodo (#1037)

Update Icepack to #b91f1dd73d6c847
  -adds David Clemens-Sewall and Bin Zhao to zenodo

Author: apcraig

.zenodo.json

@@ -31,6 +31,10 @@
             "affiliation": "Environment and Climate Change Canada", 
             "name": "Philippe Blain"
         }, 
+        {
+            "affiliation": "National Center for Atmospheric Research", 
+            "name": "David Clemens-Sewall"
+        }, 
         {
             "affiliation": "National Oceanographic and Atmospheric Administration (CTR)", 
             "name": "Anthony Craig"
@@ -107,6 +111,10 @@
             "affiliation": "National Oceanographic and Atmospheric Administration", 
             "name": "Denise Worthen"
         }, 
+        {
+            "affiliation": "National Aeronautics and Space Administration", 
+            "name": "Bin Zhao"
+        }, 
     ], 
     "access_right": "open", 
     "repository_url": "https://github.com/CICE-Consortium/CICE",