Move numpy tutorial to after language basics

docs/tutorial.rst

@@ -153,4 +153,5 @@ Language Details
 ================
 
 For more about the Cython language, see :ref:`language-basics`. 
+To dive right in to using Cython in a numerical computation context, see :ref:`_numpy_tutorial`.
 

index.rst

@@ -9,7 +9,6 @@ Contents:
 
    docs/overview
    docs/tutorial
-   docs/numpy_tutorial
    docs/language_basics
    docs/extension_types
    docs/special_methods
@@ -17,6 +16,7 @@ Contents:
    docs/external_C_code
    docs/source_files_and_compilation
    docs/wrapping_CPlusPlus
+   docs/numpy_tutorial
    docs/limitations
    docs/pyrex_differences
    docs/early_binding_for_speed