uniformisation de l'utilisation de l'extension .hpp

forms/neighborhoodWidget.ui

include/automaton.hpp

include/colorlabel.hpp

include/grid.hpp

include/gridview.hpp

include/history.hpp

include/neighborhoodrule.hpp

include/simulation.hpp

include/transition_rules/lifegametransition.hpp

src/colorlabel.cpp

src/grid.cpp

src/history.cpp

src/interface.cpp

src/mathexpr.cpp

src/neighborhood_rules/arbitraryneighborhoodrule.cpp

src/src.pro

src/transition_rules/lifegametransition.cpp

tests/grid_test.cpp

tests/history_test.cpp

tests/lifegametransition_test.cpp