Added target attribute support. Ignite Object now supports setProperties. Added null check for props. Fixed some documentation wording.

ignite-element.js

@@ -180,7 +180,15 @@ class IgniteElement extends HTMLElement {
      * Sets all the property values on this element.
      */
     setProperties(props) {
-        if (props) {
+        if (props == null || props == undefined) {
+            return;
+        }
+
+        if (props instanceof IgniteObject) {
+            props.update();
+
+            Object.getOwnPropertyNames(props).forEach(name => this[name] = props[name]);
+        } else {
             Object.keys(props).forEach(name => this[name] = props[name]);
         }
     }