WebKitGTK 2.52.4 released!

This is a bug fix release in the stable 2.52 series.

Add support for half-width fonts.
Improve content filter compilation by avoiding file copies.
Improve handling of out of disk space conditions when the NetworkProcess tried to write data in caches.
Improve how the CMake build system checks whether libatomic is required.
Fix painting scrollbars when their width changes.
Fix playback of certain YouTube videos with low frame rates.
Fix webkit://gpu not working in systems where neither libGL.so.1 nor libOpenGL.so.0 are available.
Fix the build with librice 0.4 or newer when the GStreamer WebRTC backend is enabled at build configuration time.
Fix the build with USE_GSTREAMER_WEBRTC=OFF.
Fix the build with USE_GBM=OFF.
Fix several crashes and rendering issues.

Thanks to all the contributors who made possible this release.