Merge pull request #56 from zdobersek/webkitgtk

WebKitGTK+ update
gst1-omx: fix omxaudiosink typo in rpi config
cairo: depend on GLib

This dependency is required so that cairo-gobject is built.
Cairo-gobject is then required by libgtk3.
Merge pull request #57 from Metrological/cairo-glib

cairo: depend on GLib
gstreamer1: bump to version 1.3.3
qtbrowser: add workaround for slow performance on pointer
rpi: adding qt5 + gtk webkit defconfig in one release
qt5: bump to 5.3.1
qt5webkit: cleaning up make for tools
Add the Cairo patch for creating Cairo devices with existing EGL surfaces.
Bump the WebKitGTK+ commit tag.
Bump the webkitgtk-shell commit tag. Change the GitHub repository for the package.