Remove unsued imports

	modified:   experiments/gui_variable_square_lattice_test.py
Small clean up, refactoring code

	modified:   cellular_automata/states/base.py
	modified:   cellular_automata/visualization/tkinter_visualization.py
Initial version of setting up simulation or evolution

	new file:   evosim/__init__.py
	new file:   evosim/evolution.py
	new file:   evosim/simulation.py
Adds support for mapping color into cell state variable

	modified:   evosim/simulation.py
Moved automaton constructor to better place

	deleted:    cellular_automata/automaton/__init__.py
	renamed:    cellular_automata/automaton/creator.py -> cellular_automata/creator.py
	modified:   evosim/simulation.py
Initial version of irregular cell

	new file:   cellular_automata/cells/irregular.py