Fix runtime ordering and other minor fixes

lib/src/codegen/html_codegen.dart

Index: lib/src/codegen/html_codegen.dart
diff --git a/lib/src/codegen/html_codegen.dart b/lib/src/codegen/html_codegen.dart
index 2f1908b42ee5b6aab180af711ee10c8c99131814..31f25600c207a0262c0729f0ae47f96fee17974f 100644
--- a/lib/src/codegen/html_codegen.dart
+++ b/lib/src/codegen/html_codegen.dart
@@ -28,8 +28,8 @@ String generateEntryHtml(HtmlSourceNode root, CompilerOptions options) {
   var document = root.document.clone(true);
   var scripts = document.querySelectorAll('script[type="application/dart"]');
   if (scripts.isEmpty) {
-    _log.severe('No <script type="application/dart"> found in ${root.uri}');
-    return null;
+    _log.warning('No <script type="application/dart"> found in ${root.uri}');
+    return '${document.outerHtml}\n';

[vsm, 2015/06/11 17:27:40]

Note, todo requires --resources="todo.html".  That file gets processed here, but
it only has angular templates, no dart code.

[Jennifer Messerly, 2015/06/11 18:28:25]

yeah, I'd be totally fine removing this warning. An HTML file is an HTML file
... if we need to serve it, we serve it. Not having a Dart script is not an
error in an HTML file :)

   }
   scripts.skip(1).forEach((s) {
     // TODO(sigmund): allow more than one Dart script tags?