Added a set properties function to IgniteElement to help populate an element's events quickly.

ignite-element.js

@@ -167,6 +167,13 @@ class IgniteElement extends HTMLElement {
         return ret;
     }
 
+    /**
+     * Sets all the property values on this element.
+     */
+    setProperties(props) {
+        Object.keys(props).forEach(name => this[name] = props[name]);
+    }
+
     /**
      * Creates the getters/setters for properties in this
      * ignite element and initializes everything.