[imp] install (and use ) imp and dimp in parallel

[Andreas Moroder]

> You can set DIMP as the initial application after login in the user
> preferences. See also http://wiki.horde.org/CustomizingPreferences and
> search for DIMP there.
>
> Or you can use this as a starting point:
> http://wiki.horde.org/Doc/Admin/Config/Imp
>
> Jan.
>
Hello,

thank you very much I change the config as in
http://wiki.horde.org/CustomizingPreferences

Now I can use DIMP even if I did not change the hook as in
"And then, the change hook:" because I don't know what file to use.
Probably this is the reason why the standard sidebar ( the one with 
kronolith and other apps ) disappears when I choose DIMP.

Bye
Andreas