Translate cp65001 encoding to UTF-8 (#862)

src/gam.py

@@ -94,6 +94,12 @@ Go to the following link in your browser:
     {address}
 """
 
+def cp65001(name):
+  if name.lower() == "cp65001":
+    return codecs.lookup("utf-8")
+
+codecs.register(cp65001)
+
 # Override and wrap google_auth_httplib2 request methods so that the GAM
 # user-agent string is inserted into HTTP request headers.
 def _request_with_user_agent(request_method):