overview of changes between 1.9.0 and 1.9.1
==========================================
* Support setting of font options and DPI on PangoContext for
  the Cairo backend.
* Adapt to recent Cairo API changes
* Win32 build improvements [Tor Lillqvist]
* Misc bug fixes [Hans Breuer, Thomas Fitzsimmons, Kazuki IWAMOTO]

Overview of changes between 1.8.x and 1.9.x