modify windows intall instructions

modify windows intall instructions : direct user to general python download page, and click on big yellow button for version 3.4.1
appropriate version for user's version of windows will be downloaded

Author: alaindomissy

part-0.ipynb

@@ -46,8 +46,11 @@
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "You can download Python for Windows from the website https://www.python.org/download/releases/3.4.1/. After downloading the *.msi file, you should run it (double-click on it) and follow the instructions there. It is important to remember the path (the directory) where you installed Python. It will be needed later!"
-     ]
+      "Please go to this website page https://www.python.org/downloads/ to download the Python installer:\n",
+      "- click on the `Download Python 3.4.1` button (a yellow button on left side of screen),\n",
+      "- download the Windows x86-64 MSI installer msi file `python-3.4.1.amd64.msi` and save it to your pc,\n",
+      "- double click the downloaded file to open it and run the installer 
+       ]
     },
     {
      "cell_type": "heading",
@@ -170,4 +173,4 @@
    "metadata": {}
   }
  ]
-}
+}