Add widget methods chapter
Add widget methods chapter

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branch : feature-sphinx

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