Merge branch 'unify-lofar-msv3read' into 'master'

cpp/CMakeLists.txt

cpp/beamformerlofar.h

cpp/element.h

cpp/msreadutils.cc

cpp/msreadutils.h

cpp/msv3readutils.cc

cpp/msv3readutils.h

cpp/station.h

cpp/telescope/lofar.cc

cpp/telescope/lofar.h

cpp/telescope/oskar.cc

cpp/telescope/oskar.h

cpp/telescope/phasedarray.h

cpp/test/tlofar_hba.cc

demo/beam-helper.h

demo/comparison-oskar/make_station_response_image.cpp

demo/misc/aartfaac_coord.cc

demo/misc/makeresponseimage.cc

demo/tElementBeamCommon.h

demo/tStation.cc