From Qt 5.7 -> LGPL v2.1 isn't an option anymore, see
http://blog.qt.io/blog/2016/01/13/new-agreement-with-the-kde-free-qt-foundation/
Updated license headers to use new LGPL header instead of LGPL21 one
(in those files which will be under LGPL v3)
Change-Id: I046ec3e47b1876cd7b4b0353a576b352e3a946d9
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
Change-Id: Ifc99af49398e5d6e057035d2de55fe218c8418d6
Reviewed-by: Andy Nichols <andy.nichols@theqtcompany.com>
Reviewed-by: Robin Burchell <robin.burchell@viroteck.net>