moving randomstreams and module_vs_op from basic to advanced

doc/advanced/index.txt

@@ -13,6 +13,8 @@ Advanced Topics
     profilemode
     debug_faq
     debugmode
+    module_vs_op
+    randomstreams
 
 
 .. env

doc/basic_tutorial/index.txt

@@ -32,6 +32,4 @@ Now we're ready for the tour:
    examples
    function
    module
-   module_vs_op
-   randomstreams
    tools