[CMake] Getting started with CMake

[Russell Wallace]

Thanks! That's clearer now. I guess using a separate build
subdirectory has an advantage in that if something goes wrong you can
just scrub that whole subdirectory and try again.

a couple of dead links from http://www.cmake.org/Wiki/CMake#Tutorials
- the following give 404:

http://snikt.net/index.php/2010/04/01/howto-use-cmake-with-cc-projects
http://hackerwithin.org/thw/plugin_wiki/page/buildsystems