In the SConstruct, instead of expecting the terminology and reference-models repositories to have been checked out under the adl-tools respository, look for them as siblings of it, i.e., one directory up.

Instead of installing the whole terminology repository, only copy the "Release-1.0.2" sub-directory. This keeps it looking the same as it used to be.

Simplify the Eiffel SCons builder by removing the Files() method; use Glob() instead.