Merge the Sky Engine changes from the SkyDart branch

sky/tests/modules/basic.sky

Index: sky/tests/modules/basic.sky
diff --git a/sky/tests/modules/basic.sky b/sky/tests/modules/basic.sky
index 6ce4a3a76df8a644f8e3ec16fe46b3fc31c88950..97a538f817a7b3b5ce995702dd4533751e53cae7 100644
--- a/sky/tests/modules/basic.sky
+++ b/sky/tests/modules/basic.sky
@@ -3,6 +3,10 @@
 <import src="resources/pass.sky" as="hello" />
 <div id="result">FAIL</div>
 <script>
-document.getElementById("result").textContent = hello;
+import "dart:sky";
+
+void main() {
+    document.getElementById("result").textContent = hello.kHello;
+}
 </script>
 </html>