Merge pull request #39 from zdobersek/webkitgtk

Improve GtkWidget redraw queueing in WaylandCompositorDispmanX
qt5webkit: bump version.
Fixes #38.

qt5webkit changes:

1570f7a Fix build when NSD is enabled.
0a122e3 GraphicsSurface support added to the canvas implementation.
        Enable canvas acceleration by default if supported.
101adcc Added GraphicsSurface implementation for EGL
Merge pull request #40 from magomez/bump

qt5webkit: bump version.
Bump the webkitgtk commit tag.