Log Message:
py-urwid: updated to 2.2.3

Urwid 2.1.2
===========
* Add pack method to LineBox.
* Add a test to check the linebox.pack is good. (by Miguel de Dios)
* Add bin/release.sh script to partially automate releases. (by Tony Cebzanov)
* Add workaround for 386 (by Tony Cebzanov)
* Fix curses_display python3 ord() (by Ya-Liang Chang (Allen))
* Fix bumping to dev version in release.sh script (by Tony Cebzanov)
* Fix focus_end on a collapsed tree (by Anonymous Maarten)
* Fix crash with "ellipsis" clipping for py2 tour.py works with py2 \ 
now Typo in
  tour.py (by akorb)
* Ignore resetting to invalid locale (Closes 377) (by Jochen Sprickerhof)
* Use ord2 for python2/3 compatibility (by Ya-Liang Chang (Allen))