use document fragments to grow repeaters

- unless we are repeating OPTION elements, buffer new nodes in document
  fragment and append them to the DOM in one go at the end
- for OPTION elements we have to keep on using the old way
  because of how option widget communicates with select widget
  this should be change, but that change is out of scope of this CL
- modify jqLite to support wrapping of document fragments
- fix jqLite documentation typo

This change unintentionally avoids the following webkit bug that
that affects repeater growth:
https://bugs.webkit.org/show_bug.cgi?id=57059

However the following bug affecting shrining of repeaters is still
unresolved https://bugs.webkit.org/show_bug.cgi?id=57061

src/jqLite.js

@@ -66,7 +66,7 @@ function JQLite(element) {
     div.innerHTML = '<div>&nbsp;</div>' + element; // IE insanity to make NoScope elements work!
     div.removeChild(div.firstChild); // remove the superfluous div
     JQLiteAddNodes(this, div.childNodes);
-    this.remove(); // detach the elements form the temporary DOM div.
+    this.remove(); // detach the elements from the temporary DOM div.
   } else {
     JQLiteAddNodes(this, element);
   }
@@ -136,8 +136,7 @@ function JQLiteAddNodes(root, elements) {
       ? elements
       : [ elements ];
     for(var i=0; i < elements.length; i++) {
-      if (elements[i].nodeType != 11)
-        root.push(elements[i]);
+      root.push(elements[i]);
     }
   }
 }

src/widgets.js

@@ -914,6 +914,8 @@ angularWidget('@ng:repeat', function(expression, element){
           lastIterElement = iterStartElement,
           collection = this.$tryEval(rhs, iterStartElement),
           collectionLength = size(collection, true),
+          fragment = (element[0].nodeName != 'OPTION') ? document.createDocumentFragment() : null,
+          addFragment,
           childScope,
           key;
 
@@ -938,13 +940,26 @@ angularWidget('@ng:repeat', function(expression, element){
             children.push(childScope);
             linker(childScope, function(clone){
               clone.attr('ng:repeat-index', index);
-              lastIterElement.after(clone);
-              lastIterElement = clone;
+
+              if (fragment) {
+                fragment.appendChild(clone[0]);
+                addFragment = true;
+              } else {
+                //temporarily preserve old way for option element
+                lastIterElement.after(clone);
+                lastIterElement = clone;
+              }
             });
           }
           index ++;
         }
       }
+
+      //attach new nodes buffered in doc fragment
+      if (addFragment) {
+        lastIterElement.after(jqLite(fragment));
+      }
+
       // shrink children
       while(children.length > index) {
         children.pop().$element.remove();