new metadata attrs. default Container.filters. replace ContainerCollection with list.
renamed curses.py to main.py. there is a curses in stdlib
util func to make grid of widgets. escape from dialog with esc. trac flagged nodes.
renamed curses.py to main.py. there is a curses in stdlib
new metadata. make sure root node has a name.
use common parent for dialog classes. fix some cosmetic stuff. filtering by type.
version bump