Common reorg (#8025)

* Re-organize common folder

* fix: Correct paths in tests

* fix: move new content to proper folder

* chore: Move audio folder to assets

* Move sprites to sprites assets directory

* Move css sprites to assets directory

* Split out readmes for common code and sprites

* Move images to assets directory

* Move destinatin of shared browserified file

* remove unused file

* move compiled js to client-old

* Fix karma tests

* fix: Correct paths for sprites

website/common/script/libs/preenTodos.js

@@ -0,0 +1,12 @@
+import moment from 'moment';
+import _ from 'lodash';
+
+// TODO used only in v2
+
+module.exports = function preenTodos (tasks) {
+  return _.filter(tasks, (t) => {
+    return !t.completed || t.challenge && t.challenge.id || moment(t.dateCompleted).isAfter(moment().subtract({
+      days: 3,
+    }));
+  });
+};