Remove dummy version number and also verify that one is set.

Task-number: QBS-300

Change-Id: I168c0f12d569af2c77663b2c40cd5c3443d966db
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
MSVC: do not invoke shell to copy files

Otherwise we'd have to quote files with special characters that are
interpreted by the shell.

Task-number: QBS-298

Change-Id: If0e0bb0224ab696730842aabac4e36e335f14e3c
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>