python: post installer docs fix script
* Moved post_installer.py into the examples/howto/ directory. * Added instructions for its use to the Python Bindings HOWTO. * Ran it as intended from the lang/python/ directory in order to both prove it works and quickly and easily get the updated howto replicated. Also to fix all those .texi files.
Tested-by: Ben McGinnes <firstname.lastname@example.org>
- Signed-off-by: Ben McGinnes <email@example.com>