fix namespaced focus & blur event delegation

Handlers for namespaced focus & blur events weren't attached correctly
in the delegation scenario.

Closes madrobby#552

src/event.js

@@ -128,13 +128,7 @@
   }
 
   $.fn.delegate = function(selector, event, callback){
-    var capture = false
-    if(event == 'blur' || event == 'focus'){
-      if($.iswebkit)
-        event = event == 'blur' ? 'focusout' : event == 'focus' ? 'focusin' : event
-      else
-        capture = true
-    }
+    var capture = /^(?:blur|focus)(?:\..*)?$/.test(event)
 
     return this.each(function(i, element){
       add(element, event, callback, selector, function(fn){

test/zepto.html

@@ -2232,6 +2232,29 @@ <h1>Zepto DOM unit tests</h1>
         t.assertEqual(4, counter)
       },
 
+      testDelegateNamespacedBlurFocus: function(t) {
+        var counter = 0
+        $('#delegate_blur_test').delegate('input', 'blur.namespace_test', function(){ counter++ })
+
+        $('#delegate_blur_test').find('input').focus()
+        $('#delegate_blur_test').find('input').blur()
+        t.assertEqual(1, counter)
+
+        $('#delegate_blur_test').find('input').focus()
+        $('#delegate_blur_test').find('input').blur()
+        t.assertEqual(2, counter)
+
+        $('#delegate_focus_test').delegate('input', 'focus.namespace_test', function(){ counter++ })
+
+        $('#delegate_focus_test').find('input').focus()
+        $('#delegate_focus_test').find('input').blur()
+        t.assertEqual(3, counter)
+
+        $('#delegate_focus_test').find('input').focus()
+        $('#delegate_focus_test').find('input').blur()
+        t.assertEqual(4, counter)
+      },
+
       testDelegateReturnFalse: function(t){
         $(document.body).delegate('#some_element', 'click', function(){ return false })