Fixed the broken each function.

The return value of `setTimeout` in
`return (scripts[path] == 2) ? callback() : setTimeout(function () { loading(path, true)  }, 0)`
will stop the `each` function (implemented by `every`)

When loading different files lists that sharing the same file, the one called later will never been loaded (see the test).

Author: houkanshan

src/script.js

@@ -23,7 +23,8 @@
   }
   function each(ar, fn) {
     every(ar, function (el) {
-      return !fn(el)
+      fn(el)
+      return 1
     })
   }
 

tests/tests.js

@@ -141,6 +141,15 @@ script('../node_modules/domready/ready.js', function () {
         })
       })
 
+      test('double loaded file in different loading list', 2, function() {
+        script(['../vendor/lab2.js', '../vendor/lab2.min.js'], function() {
+          ok(true, 'lab2 and lab2.min have been loaded')
+        })
+        script(['../vendor/lab2.js', '../vendor/head.js'], function() {
+          ok(true, 'lab2 and head have been loaded')
+        })
+      })
+
     })
     start()
   })