modified:   Makefile
	modified:   animate_wave.py
	deleted:    energy_of_standing_wave.png
	modified:   rkf45.cpp
	modified:   rkf45.hpp
	modified:   standing_wave.cpp
	new file:   test_delta_e.py
	new file:   travelling_wave.cpp
	modified:   wave_equation.cpp
	modified:   wave_equation.hpp