STochasticAveragedGradient... we'll see how it does.
Merge branch 'master' of github.com:dlwh/breeze

Conflicts:
	math/src/main/scala/breeze/optimize/AdaptiveGradientDescent.scala
ugh, stupid bug insoftmax.
gradient tester should really return a Tensor.
Merge branch 'master' of github.com:dlwh/breeze
Merge branch 'master' of https://github.com/fommil/breeze