Merge branch 'wip/ricotz/webkit'. Fixes Bug 788113.
This became necessary sooner rather than later since WebKitGTK 2.21 with the upstream valac bindings are now incompatible with the custom in-source bindings.
This became necessary sooner rather than later since WebKitGTK 2.21 with the upstream valac bindings are now incompatible with the custom in-source bindings.