Improve Windows start menu shortcuts
Remove PyLab mode shortcuts for Notebook and QtConsole
Use base documentation URL
Merge pull request #2635 from cgohlke/windows-startmenu

Improve Windows start menu shortcuts

* Create Windows start menu shortcuts with better names.
* Add shortcuts for IPython Notebook and online documentation.
* Add icons for IPython console and notebook.
* Apply PEP8 to ipython_win_post_install.py.
* Tested on win32-py2.7, win-amd64-py2.7, win-amd64-py3.3, Windows 8.