0.5.0:

* Surface:
  - Created derived classes for PDF, PS, SVG, Glitz, 
  X11 and Win32 surfaces, which are only available if your copy 
  of cairo supports those surfaces. The X11 and Win32 Surface headers 
  must be #included explicitly.
  (Jonathon Jongsma)
  - Added write_to_png() and write_to_png_stream(), available when PNG 
  support is available in Cairo.
  (Jonathon Jongsma)
* Examples: Added PNG, PDF, PS, and SVG Surface examples.
  (Jonathon Jongsma)
* Added API documentation generation with doxygen (Jonathon Jongsma)
 
0.4.0:

* Add Cairo::RefPtr<> and use all reference-counted 
  objects via it. Use the static create() methods 
  instead of new for these classes.
* Context:
  - Change set_dash(void) to unset_dash().
  - Change rotate_deg() to rotate_degrees().
  - Change identity_matrix() to set_identity_matrix().\
  - Change new_path() to clear_path().
* FontFace: Remove get/set_user_data(), because it seems useless.

0.3.0:

* Context:
  - Change mask_surface() to mask() and
    set_source_surface() to set_source().
  - Add typedef for Matrix, but a real Matrix 
  class would be nice.
* Pattern: Created hierarchy of classes.
* Check for errors in constructors.
* Exception: Rename to logic_error, and throw 
  std::bad_alloc or std::io_base::failure instead 
  when appropriate.
  (Murray Cumming)