TODO:


SHORT-TERM:

- fix the BUGS (cf BUGS)
- improve handling of SIGSTP and SIGWINCH when using filters that launch pagers or editors 
- write a RlwrapFilter.py

- add RLWRAP_VERSION to filter environment and add a method $filter->rlwrap_minimal_version($v)
- make rlwrap adequately report a segmentation violation of command (instead of reporting that it 
  crashed itself, which it didn't)
- use proc/$command_pid/wchan to decide whether a prompt is indeed a prompt
- find analogues of /proc/$command_pid/wchan on other unices


LONG-TERM:






