event latencies quantified by matlab vs python code offset by 1.66667ms

[darcywaller]

The timing of the peak spectral event latency for spectral events quantified from demo data with the MATLAB versus Python version of the toolbox are offset by 1.66667ms (MATLAB events being exactly 1 sample point later at 600Hz). (Suspect but am not 100% certain that this discrepancy may partially have something to do with differences in decimal point precision between MATLAB and Python, as functions like np.arange on line 198 of spectralevents.py return 4 fewer decimal points which could contribute to a difference in timing - ex: 0.1767 vs. 0.17666667.)