[CMake] Eclipse CDT and CMake

[Trevor Kellaway]

Hi,

> The biggest thing to realize about combining the two was that 
> a true "out of source" was not letting eclipse work to its 
> full potential. Creating the "Build" directory within the 
> project directory was one of the major "Ah HAH!" moments for me.

There is also the alternative of setting up the Eclipse project one
directory higher than the source tree, giving the best of both worlds:

 .../myproj
 .../myproj/source
 .../myproj/build/debug
 .../myproj/build/release

 - TrevK