results of speed test are now saved with the revision

tests/c++/test-on-i5-4300U.log

@@ -0,0 +1,15 @@
+Compile with gcc
+Should be:
+test01, +1.41154e+00, +4.17695e-01, +9.93844e-01, +1.59427e-01, +1.25809e+00, +3.67376e-01, +2.95915e-01
+Result:
+-- C++ time consumed 0.00700425 sec
+-- C++ time consumed 0.0670615 sec
+-- C++ time consumed 0.669772 sec
+
+test01, +1.41154e+00, +4.17695e-01, +9.93844e-01, +1.59427e-01, +1.25809e+00, +3.67376e-01, +2.95915e-01  
+ Theta,         S1.r,         S1.i,         S2.r,         S2.i
+  0.00, +3.52885e-01, -4.27839e-01, +3.52885e-01, -4.27839e-01  
+ 22.50, +3.44554e-01, -4.14362e-01, +3.29828e-01, -3.94049e-01  
+ 45.00, +3.21195e-01, -3.76903e-01, +2.65943e-01, -3.03992e-01  
+ 67.50, +2.87219e-01, -3.23325e-01, +1.75076e-01, -1.85579e-01  
+ 90.00, +2.48609e-01, -2.63824e-01, +7.48392e-02, -6.95864e-02