Update windows installation and other notes

Making allowance for new convenience of `get-pip.py` that automatically installs setuptools and pip together.

Stop recommending distribute, which has now been merged into setuptools.

docs/installation.rst

@@ -3,7 +3,7 @@
 Installation
 ============
 
-Flask depends on two external libraries, `Werkzeug
+Flask depends on some external libraries, like `Werkzeug
 <http://werkzeug.pocoo.org/>`_ and `Jinja2 <http://jinja.pocoo.org/2/>`_.
 Werkzeug is a toolkit for WSGI, the standard Python interface between web
 applications and a variety of servers for both development and deployment.
@@ -13,7 +13,7 @@ So how do you get all that on your computer quickly?  There are many ways you
 could do that, but the most kick-ass method is virtualenv, so let's have a look
 at that first.
 
-You will need Python 2.6 or higher to get started, so be sure to have an
+You will need Python 2.6 or newer to get started, so be sure to have an
 up-to-date Python 2.x installation.  For using Flask with Python 3 have a
 look at :ref:`python3-support`.
 
@@ -67,7 +67,7 @@ folder within::
     $ cd myproject
     $ virtualenv venv
     New python executable in venv/bin/python
-    Installing distribute............done.
+    Installing setuptools, pip............done.
 
 Now, whenever you want to work on a project, you only have to activate the
 corresponding environment.  On OS X and Linux, do the following::
@@ -113,9 +113,9 @@ Get the git checkout in a new virtualenv and run in development mode::
     $ git clone http://github.com/mitsuhiko/flask.git
     Initialized empty Git repository in ~/dev/flask/.git/
     $ cd flask
-    $ virtualenv venv --distribute
+    $ virtualenv venv
     New python executable in venv/bin/python
-    Installing distribute............done.
+    Installing setuptools, pip............done.
     $ . venv/bin/activate
     $ python setup.py develop
     ...
@@ -129,45 +129,53 @@ To just get the development version without git, do this instead::
 
     $ mkdir flask
     $ cd flask
-    $ virtualenv venv --distribute
+    $ virtualenv venv
     $ . venv/bin/activate
     New python executable in venv/bin/python
-    Installing distribute............done.
+    Installing setuptools, pip............done.
     $ pip install Flask==dev
     ...
     Finished processing dependencies for Flask==dev
 
 .. _windows-easy-install:
 
-`pip` and `distribute` on Windows
------------------------------------
+`pip` and `setuptools` on Windows
+---------------------------------
 
-On Windows, installation of `easy_install` is a little bit trickier, but still
-quite easy.  The easiest way to do it is to download the
-`distribute_setup.py`_ file and run it.  The easiest way to run the file is to
-open your downloads folder and double-click on the file.
+Sometimes getting the standard "Python packaging tools" like *pip*, *setuptools*
+and *virtualenv* can be a little trickier, but nothing very hard. The two crucial
+packages you will need are setuptools and pip - these will let you install
+anything else (like virtualenv). Fortunately there are two "bootstrap scripts"
+you can run to install either.
 
-Next, add the `easy_install` command and other Python scripts to the
-command search path, by adding your Python installation's Scripts folder
-to the `PATH` environment variable.  To do that, right-click on the
-"Computer" icon on the Desktop or in the Start menu, and choose "Properties".
-Then click on "Advanced System settings" (in Windows XP, click on the
-"Advanced" tab instead).  Then click on the "Environment variables" button.
-Finally, double-click on the "Path" variable in the "System variables" section,
-and add the path of your Python interpreter's Scripts folder. Be sure to
-delimit it from existing values with a semicolon.  Assuming you are using
-Python 2.7 on the default path, add the following value::
+If you don't currently have either, then `get-pip.py` will install both for you
+(you won't need to run ez_setup.py).
 
+`get-pip.py`_
 
-    ;C:\Python27\Scripts
+To install the latest setuptools, you can use its bootstrap file:
 
-And you are done!  To check that it worked, open the Command Prompt and execute
-``easy_install``.  If you have User Account Control enabled on Windows Vista or
-Windows 7, it should prompt you for administrator privileges.
+`ez_setup.py`_
 
-Now that you have ``easy_install``, you can use it to install ``pip``::
+Either should be double-clickable once you download them. If you already have pip,
+you can upgrade them by running::
 
-    > easy_install pip
+    > pip install --upgrade pip setuptools
 
+Most often, once you pull up a command prompt you want to be able to type ``pip``
+and ``python`` which will run those things, but this might not automatically happen
+on Windows, because it doesn't know where those executables are (give either a try!).
 
-.. _distribute_setup.py: http://python-distribute.org/distribute_setup.py
+To fix this, you should be able to navigate to your Python install directory
+(e.g ``C:\Python27``), then go to ``Tools``, then ``Scripts``; then find the
+``win_add2path.py`` file and run that. Open a **new** Command Prompt and
+check that you can now just type ``python`` to bring up the interpreter.
+
+Finally, to install `virtualenv`_, you can simply run::
+
+    > pip install virtualenv
+    
+Then you can be off on your way following the installation instructions above.
+
+.. _get-pip.py: https://raw.github.com/pypa/pip/master/contrib/get-pip.py
+.. _ez_setup.py: https://bitbucket.org/pypa/setuptools/raw/bootstrap/ez_setup.py