WebKitGTK+ 2.5.90 released!

This is a development release leading toward 2.6 series.

Use free icons for the web inspector.
Change WebKitWebView::load-failed-with-tls-errors signal to pass the failing URI as signal argument instead of the host.
Add new API to allow overwrite existing files when downloading a file.
Add webkit_uri_response_get_http_headers() API.
Improve the UI of the HTTP authentication dialog.
Fix a crash when navigating away from a web page containing an ogg video.
Fix race condition when downloading a file due to the intermediate temporary file.
Fix toggle buttons rendering with recent GTK+ versions.
Fix selection rendering when unfocused with recent GTK+ versions.
Make the GStreamer media backend not send the transferMode HTTP header.
Translation updates: Assamese

Thanks to all the contributors who made possible this release.