more miscellaneous fixes while integrating into webapp

example/genqlient.graphql

@@ -0,0 +1,12 @@
+query getViewer {
+  viewer {
+    MyName: name
+  }
+}
+
+# getUser gets the given user's name from their username.
+query getUser($Login: String!) {
+  user(login: $Login) {
+    theirName: name
+  }
+}