[Qbs] Branch 2.4 created

[Christian Kandeler]

Hi,

we have branched off Qbs 2.4. Scheduled release date for
version 2.4.0 is end of July  (together with Qt Creator 14.0).
We recommend users to try this branch with their projects and report
back any new problems they find.
Contributors are requested to push bug fixes and small, zero-risk
improvements to this branch, while features continue to go to master.
Patches currently under review can be moved if they are reasonably close to
finished.


Christian