persisting zoom setting in electron, fixes #112

src/public/javascripts/services/options_init.js

@@ -0,0 +1,9 @@
+import server from "./server.js";
+
+const optionsReady = new Promise((resolve, reject) => {
+    $(document).ready(() => server.get('options').then(resolve));
+});
+
+export default {
+    optionsReady
+}