[CMake] Updated CMake page in wxWidgets wiki

[Jorgen Bodde]

Hi all,

I have updated this page

http://www.wxwidgets.org/wiki/index.php/CMake

To use CMake with wxWidgets. It uses the latest FindwxWidgets.cmake
script in CMake, which seems to work nicely. I did only test it on
Windows VS.NET 2003 so if someone finds problems on other platforms,
please let me know.

It works with the latest wxWidgets v2.8.0.

Regards,
- Jorgen