Scalos: Setup could be easier

[hth313]

The supplied readme.txt is not really up to date with AROS. It mentions an AROS specific installation script that does not seem to exist.

There is a script in Extras/Scalos/s/Package-Startup that can be used to get appropriate assignments, perhaps to be used from s-s.

However, that is not enough to make it work. There is also a need to copy some files from Scalos:Storage/Envarc into Envarc:. Also there are 3 language choices and one of them should be copied into Envarc:.