Support copying of installation folder onto another machine

Squish users can sometimes install Squish on one machine and then copy the installation folder onto another machine.

This won't be possible anymore without copying qtlicd.ini (or some other shared files), and without running the daemon with --register switch).

If possible if would be good to drop these additional files copy operations and running of daemon.

Maybe the daemon could figure out that is was not running on the current machine at all and then run --register on the first start.

The initial data (all what is in qtlicd.ini) could be also stored somewhere in the Squish installation so that it can be reused for this use case.