Support for specifying an output directory (issue #106)

test/data/input/template_multiple_children_test.html

Index: test/data/input/template_multiple_children_test.html
diff --git a/test/data/input/template_multiple_children_test.html b/test/data/input/template_multiple_children_test.html
index c51b2edd6816fd54e6f58c75e8473d3b71e9129f..f78528375f91d4d2636afa089c79a539b1b15142 100644
--- a/test/data/input/template_multiple_children_test.html
+++ b/test/data/input/template_multiple_children_test.html
@@ -9,8 +9,7 @@
   <meta charset="utf-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
   <title>list_test</title>
-  <!-- use ../input/ so that the url also works from the output directory -->
-  <script type='application/javascript' src="../input/testing.js"></script>
+  <script type='application/javascript' src="testing.js"></script>
   <style>
   x-test { display: block; }
   </style>
@@ -25,7 +24,7 @@
   <x-test></x-test>
   <script type="application/dart">
     import 'dart:html';
-    import '../input/common.dart';
+    import 'common.dart';
     main() {
       window.setTimeout(() => window.postMessage('done', '*'), 0);
     }