Merge branch 'feature/add-helper-js-for-json-script' into 'master'

Add a JS helper function to parse JSON script tags created by json_script

See merge request AlekSIS/AlekSIS!136

aleksis/core/static/js/helper.js

@@ -24,4 +24,7 @@ function getNowFormatted() {
     return formatDate(getNow());
 }
 
+function getJSONScript(elementId) {
+    return JSON.parse(document.getElementById(elementId).textContent);
+}