Install the material-related headers too
Install the material-related headers too

cgaebel/gluon,cgaebel/gluon,pranavrc/example-gluon,cgaebel/gluon,KDE/gluon,KDE/gluon,KDE/gluon,KDE/gluon,cgaebel/gluon,pranavrc/example-gluon,pranavrc/example-gluon,pranavrc/example-gluon