update getSize which returns zeroSpace for hiddens

fixes #13

component.json

 {
   "name": "packery",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "author": "David DeSandro / Metafizzy",
   "main": [
     "./js/rect.js",
@@ -13,7 +13,7 @@
     "doc-ready": "desandro/doc-ready#>=0.0.3",
     "eventEmitter": ">=3",
     "eventie": "desandro/eventie",
-    "get-size": "desandro/get-size#>=1.0.0",
+    "get-size": "desandro/get-size#>=1.1.0",
     "get-style-property": "desandro/get-style-property",
     "jquery-bridget": "desandro/jquery-bridget#>=0.1.2",
     "matches-selector": "desandro/matches-selector#>=0.2.0"

js/packery.js

 /*!
- * Packery v1.0.1
+ * Packery v1.0.2
  * bin-packing layout library
  * http://packery.metafizzy.co
  *

test/hidden-items.js

+test( 'hidden items', function() {
+  var container = document.querySelector('#hidden-items');
+  var pckry = new Packery( container );
+  var itemElem1 = pckry.items[1].element;
+  var itemElem2 = pckry.items[2].element;
+  equal( itemElem1.style.left, '0px', '2nd item on left' );
+  equal( itemElem2.style.top, '0px', '3rd item on top' );
+});

test/index.html

@@ -261,6 +261,13 @@
     <div class="item h2"></div>
   </div> -->
 
+  <div id="hidden-items" class="container">
+    <div class="item w2 h2 hidden"></div>
+    <div class="item"></div>
+    <div class="item"></div>
+    <div class="item"></div>
+  </div>
+
 <script src="../components/get-style-property/get-style-property.js"></script>
 <script src="../components/get-size/get-size.js"></script>
 <script src="../components/matches-selector/matches-selector.js"></script>
@@ -296,6 +303,7 @@
 <script src="jquery-plugin.js"></script>
 <script src="declarative.js"></script>
 <script src="is-init-layout.js"></script>
+<script src="hidden-items.js"></script>
 
 </body>
 </html>

test/test.css

@@ -92,3 +92,7 @@ body {
   position: absolute;
   top: 0;
 }*/
+
+#hidden-items .hidden {
+  display: none;
+}