MakeLib: simplify interface and avoid global variables

Base/CMakeLists.txt

Device/CMakeLists.txt

Fit/CMakeLists.txt

Param/CMakeLists.txt

PyCore/CMakeLists.txt

Resample/CMakeLists.txt

Sample/CMakeLists.txt

Sim/CMakeLists.txt

cmake/BornAgain/MakeLib.cmake