Resolve "Implement MWA beam"

.gitlab-ci.yml

CMake/config.h.in

CMakeLists.txt

cpp/CMakeLists.txt

cpp/circularsymmetric/vlabeam.cc

cpp/circularsymmetric/voltagepattern.cc

cpp/common/system.h

cpp/coords/itrfconverter.cc

cpp/coords/itrfdirection.cc

cpp/griddedresponse/CMakeLists.txt

cpp/griddedresponse/dishgrid.cc

cpp/griddedresponse/dishgrid.h

cpp/griddedresponse/griddedresponse.h

cpp/griddedresponse/lofargrid.cc

cpp/griddedresponse/lofargrid.h

cpp/griddedresponse/mwagrid.cc

cpp/griddedresponse/mwagrid.h

cpp/load.cc

cpp/load.h

cpp/mwabeam/beam2016implementation.cc