Remove qt3d from git dependencies

QtLocation no longer depends on Qt3D.

Change-Id: I2cfa8290d3616c8351ccb849b72eb04e7a997309
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
Fix typo in source code comments

Change-Id: Id06713fea9ce90436a3d65a84cdbd70f07cd9397
Reviewed-by: Rainer Keller <rainer.keller@digia.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>