Changes since 0.8.0:
* Do not call FT_Done_Face on a live cairo_font_face_t as it might cause crashes
* Do not take into account Colorspace resource subdictionary for image XObjects
* Downsample 16 bit per component images to 8 bit per component so they render
* Link to pthread when the system needs it
* Fix comparing against NULL instead against INVALID_HANDLE_VALUE when calling FindFirstFile
0.8.2 version is scheduled for May 26th
Testing, patches and bug reports welcome.