WebKitGTK+ 2.3.4 released!

This is a development release leading toward 2.4 series.

Add API to WebKitResponsePolicyDecision to check if the MIME type can be shown.
Enable fullscreen API by default.
Fix handling of HTTP certificates with the network process enabled.
Fix downloads with the network process enabled.
Fix handling of cookies when network process is enabled.
Remove the partial file downloaded when the download operation fails or is cancelled.
Make WebKitWebPage::send-request signal work after a redirect.
Add xdg.origin.url extended attribute to downloads in WebKit2.
Fix WebGL with GLES.
Translation updates: Dutch, Brazilian Portuguese.

Thanks to all the contributors who made possible this release.