fix(render): allow to configure when templates are serialized to strings

Introduces the injectable `TemplateCloner` that can be configured via the new token `MAX_IN_MEMORY_ELEMENTS_PER_TEMPLATE_TOKEN`.

Also replaces `document.adoptNode` with `document.importNode` as otherwise
custom elements are not triggered in chrome 43.

Closes #3418
Closes #3433

modules/angular2/src/dom/parse5_adapter.ts

@@ -77,7 +77,7 @@ export class Parse5DomAdapter extends DomAdapter {
     return res;
   }
   elementMatches(node, selector: string, matcher = null): boolean {
-    if (!selector || selector === '*') {
+    if (this.isElementNode(node) && selector === '*') {
       return true;
     }
     var result = false;