Add test file for Lua template

Signed-off-by: Jianhui Zhao <jianhuizhao329@gmail.com>

example/test.html

@@ -0,0 +1,6 @@
+<h1>Lua Template Test</h1>
+<h1>Date: <%=os.date()%></h1>
+<h1>Method: <%=_UHTTP["HTTP_METHOD"]%></h1>
+<h1>Remote Host: <%=_UHTTP["REMOTE_HOST"]%></h1>
+<h1>Url: <%=_UHTTP["HTTP_URL"]%></h1>
+<h1>Path: <%=_UHTTP["HTTP_PATH"]%></h1>