[CMake] install(script ... and memory loss

[Micha Renner]

This is a really good idea, thank you.
>      configure_file(${CMAKE_CURRENT_SOURCE_DIR}/tInstall.txt.in
> ${CMAKE_CURRENT_BINARY_DIR}/tInstall.txt)
>      install(SCRIPT ${CMAKE_CURRENT_BINARY_DIR}/tInstall.txt)
> 
> 
Micha