IEC 61672: Time-averaging and time-weighting
Removed unnecessary import
Force Tox tests against scipy 0.13.3
NEW: integrate_bands to change frequency resolution of spectrum.
Octave: properties
FIX: Fixes OctaveBand using Octave

Fixes 4fed11e2ca
NEW: easy functions to quickly calculate octave and third-octave levels from signal
Ignoring emacs and system files
Functions for all spectra types. Improve octaves/third_octaves
WIP: Generator module

The generator module will consist of classes and tools for generating
signals like noise and waveforms.