[Tilesathome] New Client version "Rapperswil"

[Jiri Klement]

>>> All new and improved (and somewhat enforced) Auto-update
>>> this needs a working subversion program ("svn" on linux)
>>>
>>> This will break on clients that have "custom modifications" in any of
>>> their svn controlled files.
>>
>> It makes it a bit difficult to test changes before checking in.
>
> you just set the version number in $WorkingDirectory/version.txt to
> something large

Should we rather have DisableAutoUpdate parameter? It will allow to
run client without updating but it won't allow to upload rendered
tiles.

I'm pretty sure I will forget to set $WorkingDirectory/version.txt
back to correct value.