Stopped branding Python 3 support as experimental.

Forward-port of 0de21a6 from stable/1.6.x.

docs/intro/install.txt

@@ -9,9 +9,8 @@ that'll work while you walk through the introduction.
 Install Python
 --------------
 
-Being a Python Web framework, Django requires Python. It works with any Python
-version from 2.6.5 to 2.7. It also features experimental support for versions
-3.2 and 3.3. All these versions of Python include a lightweight database
+Being a Python Web framework, Django requires Python. It works with Python 2.6,
+2.7, 3.2 or 3.3. All these versions of Python include a lightweight database
 called SQLite_ so you won't need to set up a database just yet.
 
 .. _sqlite: http://sqlite.org/

docs/topics/install.txt

@@ -7,10 +7,8 @@ This document will get you up and running with Django.
 Install Python
 ==============
 
-Being a Python Web framework, Django requires Python.
-
-It works with any Python version from 2.6.5 to 2.7. It also features
-experimental support for versions from 3.2.3 to 3.3.
+Being a Python Web framework, Django requires Python. It works with Python 2.6,
+2.7, 3.2 or 3.3.
 
 Get Python at http://www.python.org. If you're running Linux or Mac OS X, you
 probably already have it installed.