Log Message:
Changes 1.6.4:
* Windows build: Fix the build on the freely available Visual Studio Express
   compiler.

Changes 1.6.2:
* Fix build on OSX when both Quartz and Xlib surfaces are enabled
* Fixed a bug where an exception message would often report "Success" \ 
when it
  should have reported an error message
* Added ability to get the error status code from an exception:
  Cairo::logic_error::get_status_code()
* Added new elements to the surface type enumeration