*** Short-term task:

- Some preferences: for example, enable that <AltGr> = <Alt><Control>

- "Keycode to Mask" table must be created at runtime (see what xmodmaps does)

*** Mid-term:

- Pidfile should be a named socket opened by the daemon (working in server-mode)

- Translate to other languages (at least make the infrastructure)

- Simplify config() and main() methods

- Right button shows a context menu: edit/delete

- Give some help to user on the windows

*** Long-term

- C version of daemon
