Doc: fixed invalid reference

Link to "Getting started with qmake" was invalid

Task-number: QTBUG-34749

Change-Id: I782dc99f5182f2fe7661377eb82f35ebb50a46cf
Reviewed-by: Martin Smith <martin.smith@digia.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Doc: invalid reference to Qt for Linux/X11

Task-number: QTBUG-34749

Change-Id: I8274e41bc4c29650b22bb6ca5da264687aa70e4a
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Use case insensitive comparison when checking platform plugin keys.

Change-Id: Iff44698dcc941ca244b476f0e6c6a993f2ad75f3
Reviewed-by: Kevin Krammer <kevin.krammer@kdab.com>
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>