WebKitGTK+ 2.7.90 released!

This is a development release leading toward 2.8 series.

Use the new memory allocator bmalloc instead of TCMalloc which drastically improves the overall performance.
Remove WebKitWebView::close-notification signal and add WebKitNotification::closed instead.
Implement support for new AtkRole types for MathML.
Add support for input color type.
Add API to allow overriding the default color chooser implementation.
Resize the accelerating compositing window to a minimum size again after leaving accelerated compositing mode to save memory.
Ensure WebKitFrame objects are released when the frame is destroyed.
Clear the GObject DOM bindings internal cache when frames are destroyed.
Implement page overlays to bring back the inspector element highlighting.
Fix startup runtime critical warnings when using the network process.
Fix the build with recent versions of GLib that have GMutexLocker.
Fix the gtk-doc generation to appear in DevHelp.

Thanks to all the contributors who made possible this release.