Adding Matlab test to evaluate C++ and ITA Toolbox implementation of Maekawa diffraction filter

tests/Maekawa/MaekawaTest.m

+%% Load C++ implementation result
+maekawa_ir_cpp = ita_read( 'MaekawaTestIR.wav' );
+
+
+%% Run ITA-Toolbox diffraction simulation
+n1 = [ -1 1 0 ];
+n2 = [ 1 1 0 ];
+loc = [ 0 1 0 ];
+w = itaInfiniteWedge( n1, n2, loc );
+
+s = [ -2 0 0 ];
+r = [ 2 0 0 ];
+
+c = 344.0;
+
+maekawa_ir = maekawa_ir_cpp;
+maekawa_ir.freqData = ita_diffraction_maekawa( w, s, r, maekawa_ir_cpp.freqVector, c );
+
+
+%% Combined result
+
+maekawa_eval = ita_merge( maekawa_ir, maekawa_ir_cpp );