User settings GUI, including some new components

ember/app/components/ui/switch-input.js

@@ -0,0 +1,19 @@
+import Ember from 'ember';
+
+/**
+  A toggle switch.
+ */
+export default Ember.Component.extend({
+  layoutName: 'components/ui/switch-input',
+  classNames: ['checkbox', 'checkbox-switch'],
+
+  label: '',
+  toggleState: true,
+
+  didInsertElement: function() {
+    var component = this;
+    this.$('input').on('change', function() {
+      component.get('changed')($(this).prop('checked'), component);
+    });
+  }
+});