Use latest blessed release
Allow LineEditor(0) -- rejects input/enter key
more work towards more common styling

- some common functions into common.py
- bring back plant.ans (used for 'system info' for now)
- make 'userlist' consistent with news & lc
- make lc.py the new command-prompt style theme
- use old amiga art for lc found from old 1995 back
- fix news.py's "quick" detection