used pointers instead of copying objects

...tAPI/libraries/armem/server/ltm/processors/Processors.cpp

...r/ltm/processors/filter/equalityFilter/EqualityFilter.cpp

...ver/ltm/processors/filter/equalityFilter/EqualityFilter.h

...API/libraries/armem/server/test/ForgettingExperiments.cpp

...ibraries/aron/similarity/data/image/NDArraySimilarity.cpp

.../libraries/aron/similarity/data/image/NDArraySimilarity.h

...obotAPI/libraries/aron/similarity/data/image/chernoff.cpp

.../RobotAPI/libraries/aron/similarity/data/image/chernoff.h

source/RobotAPI/libraries/aron/similarity/data/image/mae.cpp

source/RobotAPI/libraries/aron/similarity/data/image/mae.h

source/RobotAPI/libraries/aron/similarity/data/image/mse.cpp

source/RobotAPI/libraries/aron/similarity/data/image/mse.h