[CMake] 4th Edition CMake book now in stock

[Ken Martin]

> Does the new edition of the book talk about functions, return, break,
> raise_scope, etc?

Only on one the one page errata sheet that comes with it. The main additions
are CPack, cross compiling, a couple more steps in the tutorials, and any
updates to bring the book up to the state of CMake CVS as of a couple months
ago. 


FWIW: raise_scope no longer exists, the set command now has this
functionality using the PARENT_SCOPE modifier.

Thanks
Ken