Improves export and import function of lattice

	modified:   cellular_automata/lattices/equiangular.py
Scales random state value to interval [-1, 1]

	modified:   cellular_automata/states/base.py
Updated cmaes test after changes

	modified:   cmaes/objectives.py
	modified:   data/two_band_configuration.ltc
	modified:   experiments/cmaes_test.py
	modified:   experiments/gui_square_lattice_test.py