Finished convergence test, gonna merge now
 On branch singles_convergence
 Changes to be committed:
	renamed:    Makefile -> build/Makefile
	renamed:    source/evaluate_wavefunction.f90 -> build/source/evaluate_wavefunction.f90
	renamed:    source/generate_random_photons.f90 -> build/source/generate_random_photons.f90
	renamed:    source/rotate_to_aperture_angle.f90 -> build/source/rotate_to_aperture_angle.f90
	renamed:    source/simulation_driver_convergence.f90 -> build/source/simulation_driver_convergence.f90
	renamed:    plot_convergence.p -> plotting_scripts/plot_convergence.p
	modified:   runme_convergence.sh