NLL should set sizeAverage=false in nn.ClassNLLCriterion, to avoid reporting too small losses
Perplexity should accumulate NLL and then exponentiate this using the same base as the logarithm in nn.LogSoftMax (the natural logarithm)
Merge branch 'master' of https://github.com/paidi/dp into paidi-master
added size_average argument to Loss constructor
Merge branch 'paidi-master'