3.5.2
=====

Use multiple CSS backgrounds to render
  - progressbar patterns
  - switch sliders
  - pane separator grips
Improve HighContrast/HighContrastInverse themes to mockups
Improve support for OSD toolbars/overlays/buttons
Add support for overlay progressbars, as seen in Web
Add support for vertically linked buttons
Add an option to disable building of the GTK3 engine
Update highcontrast icon theme to latest g-i-t-s content
Improve separator line colors
Fix wrong background color of check/radios in treeviews
Fix uneven padding for toolbar buttons

3.4.2
=====

Fix gnome-contacts' toolbar separator line
Fix Nautilus' inactive pane background color
Don't generate GTK icon cache when DESTDIR is set