[test] removed test_cache since some methods of the class have been removed
[test] added test_3N_2_nondiag.expout : results of test_3N_2 proposed by R.L are traced here
[test] updated test_3U_2_nondiag : (meshGrid's size)
[test] added trace of test_3U_2_nondiag
[test] added trace of test_100U_1N
[test] updated test_2U_2T_nondiag : added FFT computations
[test] minor name change of script file
[test] minor name change of script file
[test] added trace of test_2U_2_nondiag
[test] updated test_3U_3_nondiag : added FFT computations