[CMake-Promote] Changes to Wiki page on LISTs.

[Miguel A. Figueroa-Villanueva]

Hello all,

I have made some changes to the wiki page on lists
(http://www.cmake.org/Wiki/CMakeMacroListOperations) to reflect the
new LIST command in CMake 2.4+.

I hope I have presented the changes in an appropriate way.

--Miguel