The "load-{start,committed,..}" webview signals are deprecated
The load status signals have now been replaced with the "load-status"
signal. The signal argument will be one of: "provisional", "committed",
"finished", "first-visual" or "failed" indicating the load status type.
More information can be found here:
http://webkitgtk.org/reference/webkitgtk-WebKitWebFrame.html#WebKitLoadStatus
The "load-property-update" signal has also been deprecated upstream.
Progress update signal handlers should now attach to "property::progress"