Multifrequency data and objective function

common/data/element.cpp

common/data/element.h

common/data/objective/objective.h

common/data/state.h

common/data/updater.cpp

common/data/updater.h

common/optimization/globalminimumsearch.h

common/statefunctional.cpp

common/statefunctional.h

common/wave/equation/equation.cpp

common/wave/equation/equation.h

directional.cpp

gradient.cpp

input/paper2/concrete3/ip_comparison.txt

input/paper4/line/directional.txt

input/paper4/line/synthetics.txt

inversion.cpp

ip_comparison.cpp

specific/configuration/circular_acquisition.cpp

specific/configuration/volume_acquisition.cpp