Declare EnvironmentVariable class according to standard conventions.

Change-Id: Ib8e8da8d56aa6d7f17d7e2ec138a518219febb9a
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Move concatAll function to ModUtils; it's not specific to probes.

Change-Id: I731ffa8865afd99e32c199dd38f532e671d7544a
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Add support for running Node.js using qbs run.

Change-Id: I98a38e49cbea57d44b787eec12c2cb5f2e5cd601
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>