Stepwise transition to Modern CMake Merge request for external dir.
To extend visibility, GLOBAL option added to IMPORTED library Target KFParticle, AnalysisTreeBase, AnalysisTreeBase and NicaFeatures. IMPORTED_LOCATION and INTERFACE_INCLUDE_DIRECTORIES (List of public include directories requirements for a library) properties are fixed for all Targets.
NicaDataFormat, NicaGen, NicaCut, and NicaAna IMPORTED library Targets added in InstallNicaFemto.cmake module.
cppzmq INTERFACE library Target is added.
FairRootTargets.cmake module added: