updated Windows installation instructions

content/install.txt

@@ -36,16 +36,47 @@ provided by Christoph Gohlke.  To install Kwant on Windows
    64-bit) from the official `Python download site
    <http://www.python.org/download/>`_.
 
-3. Download and install ``scipy-stack``, ``tinyarray``, and ``kwant`` for Python
-   2.7 from `Christoph Gohlke's page
-   <http://www.lfd.uci.edu/~gohlke/pythonlibs/>`_.  Once again you should choose
-   the architecture that is appropriate for your system.  ("win32" means 32-bit,
-   "amd64" means 64-bit -- even if you have a processor from Intel.)  If the
-   download from Gohlke's site is slow, try to download from `our mirror
-   <http://downloads.kwant-project.org/gohlke-mirror/>`_.
-
-   You may see a warning that says "The publisher could not be verified. Do you
-   want to run this software?". Select "Run".
+3. Open a command prompt, as described in "How do I get a command prompt" at
+   the `Microsoft Windows website <http://windows.microsoft.com/en-us/windows/command-prompt-faq>`_.
+
+4. In the command prompt window, execute::
+
+        C:\Python27\python.exe C:\Python27\Tools\Scripts\win_add2path.py
+
+   (Instead of typing this command, you can also just copy it from here and
+   paste it into the command prompt window). If you did not use the default
+   location to install python in step 2, then replace ``C:\Python27`` by the
+   actual location where python is installed.
+
+5. Reboot your computer
+
+6. Now open a command prompt with administrator rights, as described in
+   "How do I run a command with elevated permissions" at the
+   `Microsoft Windows website <http://windows.microsoft.com/en-us/windows/command-prompt-faq>`_.
+
+   In this new command prompt window, execute::
+
+       pip install -U pip
+       pip install pyreadline
+       pip install --find-links http://downloads.kwant-project.org/gohlke-mirror/ ^
+       --trusted-host downloads.kwant-project.org --no-index numpy scipy ^
+       matplotlib ipython tornado pyzmq jinja2 nose tinyarray kwant
+
+   Now you are done!
+
+If you want to run ipython notebook, open a command prompt (no need for
+Adminstrator rights this time), and type::
+
+    ipython notebook
+
+If you wish to install later other python packages form the website of
+`Christoph Gohlke <http://www.lfd.uci.edu/~gohlke/pythonlibs/>`_, download
+the package (with the ending ``.whl``) for your operating system (32 or 64 bit)
+and install it from a command prompt as::
+
+    pip install filename
+
+where filename is the name of the downloaded file.
 
 
 Ubuntu and derivatives