The arguments are optional, making it possible to use a custom function
to create the {tag,task}list layout. The base_widget arguments can be
used to override the base layout of the {tag,task}list widget.
Signed-off-by: Lukáš Hrázký <lukkash@email.cz>
Signed-off-by: Uli Schlachter <psychon@znc.in>