Widget: focus default property, docstrings for base_widget and __repr__
Widget: focus default property, docstrings for base_widget and __repr__

--HG--
branch : feature-containers

mountainstorm/urwid,wardi/urwid,zyga/urwid,drestebon/urwid,harlowja/urwid,tonycpsu/urwid,wardi/urwid,rndusr/urwid,urwid/urwid,harlowja/urwid,inducer/urwid,bk2204/urwid,harlowja/urwid,Julian/urwid,mountainstorm/urwid,foreni-packages/urwid,mountainstorm/urwid,wardi/urwid,ivanov/urwid,ivanov/urwid,ivanov/urwid,westurner/urwid,Julian/urwid,foreni-packages/urwid,westurner/urwid,urwid/urwid,zyga/urwid,rndusr/urwid,drestebon/urwid,douglas-larocca/urwid,inducer/urwid,zyga/urwid,bk2204/urwid,Julian/urwid,rndusr/urwid,hkoof/urwid,hkoof/urwid,tonycpsu/urwid,drestebon/urwid,foreni-packages/urwid,hkoof/urwid,tonycpsu/urwid,westurner/urwid,douglas-larocca/urwid,inducer/urwid,bk2204/urwid,douglas-larocca/urwid,urwid/urwid