Added help icon.

res/app/components/stf/common-ui/help-icon/help-icon-directive.js

@@ -0,0 +1,13 @@
+require('./help-icon.css')
+
+module.exports = function clearButtonDirective() {
+  return {
+    restrict: 'EA',
+    replace: true,
+    scope: {
+      topic: '@',
+      tooltip: '@'
+    },
+    template: require('./help-icon.jade')
+  }
+}