Make iPython available on OSGeo4W

(Sorry for the scribbled notes)

32bit

Install the Visual C ++ 9.0 compiler Microsoft Visual C++ Compiler for Python 2.7
Start OSGeo4W setup
Add pip with advanced installation
Start OSGeo4W shell
pip install setuptools
pip install ipython
Happiness.

64bit Insert python-devel after 2.1 of 32bit version above 2.2. Added python-devel

I am happy with the same below.

(Added on 2017/06/21)

In 64bit, win8.1 environment,

NoConsoleScreenBufferError

I get that and iPython doesn't start. For the time being

\OSGeo4W64\apps\Python27\Lib\site-packages\prompt_toolkit\terminal\win32_output.py

In ** get_win32_screen_buffer_info **

success = windll.kernel32.GetConsoleScreenBufferInfo(self.hconsole, byref(sbinfo))

success = self._winapi(windll.kernel32.GetConsoleScreenBufferInfo, self.hconsole, byref(sbinfo))

If you replace it with, it will work. (Since it is commented out in the code, it is easy to replace it.)