cinder/Cinder — pull request #427 by seph14 (2014-05-16 09:56:05+00:00)
Title: Audio2 - window functions

according to http://en.wikipedia.org/wiki/Window_function#Hamming_window
I believe oneOverN used here need to 1.0 / (length - 1) instead of 1.0 / length.
Also implemting the Hamm/Hann window function on Windows.