We require Qt 5.2 for full functionality nowadays.
It is possible to use Qt 4.8.x with restrictions.
(Qt 5.0 and 5.1 do not work because of problems with embedding
Qt Quick 2 and other Qt Quick related issues (e.g. QTCREATORBUG-10273)

Change-Id: Ib41576e8b8e3727e87141eaf0351d63158730524
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>