[CMake] target to copy include files?

[Brad Aisa]

I would like to create a target that will copy (or link) a big whack of 
include files defined in my project to a local /include folder. (They 
start life in a bunch of subfolders, and some of them are generated 
programmatically during the build.) Note that we already have an 
install-time process, what I want is to copy (or freshen, or link) all 
these include files automatically, as the last step in the build. I have 
the files in lists, ex. ta_HEADS css_HEADS etc. Thanks!