Cleaned up the documentation for DifferenceOfGaussians, Sigmoid, SigmoidedDoG, SigmoidedDoLG, and Spectrogram.
Cleaned up the documentation for DifferenceOfGaussians, Sigmoid, SigmoidedDoG, SigmoidedDoLG, and Spectrogram.

ioam/svn-history,ioam/svn-history,ioam/svn-history,ioam/svn-history,ioam/svn-history