Added Copy and SoftMax (in lua) modules (to get the demos to work with nxn).
Tried a couple things with SpatialConvolution (block connectivity, WIP).
Merge branch 'master' of https://github.com/leonbottou/torch7-custom
Merge branch 'master' of https://github.com/leonbottou/torch7-custom
fix in convolution prototype (seems to work so far, but must be double-checked)