[doc] Good documentation

[Ronald RiemVis]

Hello All,

As new user from the Horde application i did found it very annoing
that not on any place good documentattion can be found for all
parameters inside the hord configuration setup.
Basic information about the registry.php and to set the path for the
horde application is missing.
The struggle to find out for instance if the php scripts within horde
are creating the data base + horde_datatree tables is untill now not
clear.
No documentation can be found on this subject.

Are there on this moment volunteers who are maybe busy to write this
part of documentation?

Greetings,

Ronald