Merge pull request madrobby#190 from johnboxall/zepto

---

Add end() support to Zepto by wrapping methods that change the working elements.

Conflicts:
	test/zepto.html

src/zepto.js

@@ -106,6 +106,9 @@ var Zepto = (function() {
         return $$(element.parentNode, selector).indexOf(element) >= 0;
       }));
     },
+    end: function(){
+      return this.prevObject || $();
+    },
     add:function(selector,context){
       return $(uniq(this.concat($(selector,context))));
     },
@@ -306,6 +309,15 @@ var Zepto = (function() {
     }
   };
 
+  'filter,add,not,eq,first,last,find,closest,parents,parent,children,siblings'.split(',').forEach(function(property){
+    var fn = $.fn[property];
+    $.fn[property] = function() {
+      var ret = fn.apply(this, arguments);
+      ret.prevObject = this;
+      return ret;
+    }
+  });
+
   ['width', 'height'].forEach(function(property){
     $.fn[property] = function(){ var offset = this.offset(); return offset ? offset[property] : null }
   });

test/zepto.html

@@ -173,6 +173,11 @@ <h1>Zepto DOM unit tests</h1>
     <div class="eq1"></div>
     <div class="eq2"></div>
   </div>
+
+  <div id="end_test">
+    <div class="end_one"><b><span></span></b></div>
+    <div class="end_two"><b><span>1</span><span>2</span></b></div>
+  </div>
 
   <script>
 
@@ -1321,6 +1326,15 @@ <h1>Zepto DOM unit tests</h1>
         t.assertEqual($els.slice().length, 3);
         t.assertEqual(typeof $els.slice().ready, 'function');
         t.assertEqual($els.slice(-1)[0].className, 'slice3');
+      },
+
+      testEnd: function (t) {
+        t.assert($().end().length, 0);
+
+        var $endTest = $('#end_test');
+        var $endTest2 = $('#end_test').find('div').find('span').end().end();
+        t.assertEqual($endTest.length, $endTest2.length);
+        t.assertEqual($endTest.get(0), $endTest2.get(0));
       }
     });
   </script>