pin to urwid commit that works

requirements.txt

@@ -1,7 +1,7 @@
 #numpy: debian package libatlas3-base required on raspberrypi
-#psycopg: debian package libpq5 required on raspberrypi
+#psycopg: debian package libpq5 required
 additional-urwid-widgets
-git+https://github.com/djyotta/urwid.git
+git+https://github.com/djyotta/urwid.git@31cd6b518a803f146ba149461bd7f64234289453
 psycopg
 faker
 pandas