Improved some bits of documentation

include/alphabet.hpp

include/automaton.hpp

include/grid.h

include/interface.hpp

include/modelloadingdialog.hpp

include/neighborhood.hpp

include/neighborhood_rules/arbitraryneighborhoodrule.hpp

include/neighborhood_rules/mooreNeighborhoodRule.hpp

include/neighborhood_rules/vonNeumannNeighborhoodRule.hpp

include/property.hpp

include/propertyvisitors.hpp

include/savingdialog.hpp

include/state.hpp

include/stateColor.hpp

include/structurereader.hpp

include/structurewriter.hpp

include/transition_rules/circulartransition.hpp

include/transition_rules/lifegametransition.h

include/transition_rules/totalistictransition.hpp

include/transitionrule.hpp