[Moin-user] update instructions 1.3.5->1.5

[Ralf Gross]

Hi,

I'm about to move moinmoin from 1.3.5 to 1.5.2. Now I'm looking for the
_right_ update instructions.

I remember this page (in german):
http://moinmoin.wikiwikiweb.de/HilfeZumUpdaten?highlight=%28update%29

But docs/README.migration tells me just to read the CHANGES file.

1.3 to 1.5 migration
====================
Just read CHANGES, you don't need to read the stuff below.

I couldn't find update instructions (step by step) there. It's good to
point the user to the CHANGES file, but there should still be a step by
step guide what he really has to do.

Ralf