Add definition for "email-templates".

Update definition for "helmet".

email-templates/email-templates-tests.ts

@@ -0,0 +1,26 @@
+///<reference path="email-templates.d.ts"/>
+
+import EmailTemplates = require('email-templates');
+
+var EmailTemplate = EmailTemplates.EmailTemplate;
+var template = new EmailTemplate("./");
+var users = [
+    {
+        email: 'pappa.pizza@spaghetti.com',
+        name: {
+            first: 'Pappa',
+            last: 'Pizza'
+        }
+    },
+    {
+        email: 'mister.geppetto@spaghetti.com',
+        name: {
+            first: 'Mister',
+            last: 'Geppetto'
+        }
+    }
+]
+
+var templates = users.map(function(user) {
+    return template.render(user);
+})

email-templates/email-templates.d.ts

@@ -0,0 +1,54 @@
+// Type definitions for node-email-templates
+// Project: https://github.com/niftylettuce/node-email-templates
+// Definitions by: Cyril Schumacher <https://github.com/cyrilschumacher>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/**
+ * @summary Interface for result of email template.
+ * @interface
+ */
+interface EmailTemplateResults {
+    /**
+     * @summary HTML result.
+     * @type {string}
+     */
+    html: string;
+
+    /**
+     * @summary Text result.
+     * @type {string}
+     */
+    text: string;
+}
+
+/**
+ * @summary Interface for callback of email callback.
+ * @interface
+ */
+interface EmailTemplateCallback {
+    /**
+     * @summary Callback signature.
+     */
+    (err: Object, results: EmailTemplateResults): void;
+}
+
+declare module "email-templates" {
+    /**
+     * @summary Email template class.
+     * @class
+     */
+    export class EmailTemplate {
+        /**
+         * @summary Constructor.
+         * @param {string} templateDir The template directory.
+         */
+        constructor(templateDir: string);
+
+        /**
+         * @summary Render a single template.
+         * @param {EmailTemplateCallback|Object} locals The variables or callback function.
+         * @param {EmailTemplateCallback} callback The callback function.
+         */
+        render(locals: EmailTemplateCallback|Object, callback?: EmailTemplateCallback): void;
+    }
+}