[Insight-developers] Finding include and lib directories

[Bill Hoffman]

Mystery solved.   CMake was broken for in-source builds.
All the builds done at Kitware and GE are out of source builds 
which is why it was working for us.   The problem caused the
makefiles not to inherit the libraries from the parent CMakeList.txt file.
The top level Insight file has the correct thread, dl, Common, and Numerics
libraries already there.   

If you update, it should work now.

Bill L. perhaps we should set up at least one test that runs and
in-source build.  

-Bill