delete out-dated menu (#40)

* delete out-dated menu

* update index.rst

* Delete foo.rst

source/appendix/foo.rst

-###
-FAQ
-###

source/index.rst

@@ -4,27 +4,13 @@
    contain the root `toctree` directive.
 
 ##############
-欢迎来到 Fluid
+欢迎使用 Fluid
 ##############
 
-..  todo::
-    内容简介，导引
-
-
 ..  toctree::
     :maxdepth: 1
 
-    beginners_guide/index.rst
-    user_guides/index.rst
-    advanced_usage/index.rst
-    api_guides/index.rst
-    api_reference/index.rst
-    faq.rst
-
-Indices and tables
-==================
-
-* :ref:`genindex`
-* :ref:`modindex`
-* :ref:`search`
-
+    /beginners_guide/index.rst
+    /user_guides/index.rst
+    /advanced_usage/index.rst
+    /faq/index_cn.rst

source/mobile/foo.rst

-###
-FAQ
-###