adding partialSum mode for SpatialConvolution
added avg pooling to readme
Merge pull request #27 from szagoruyko/master

Added avg pooling to readme
Update README.md
disabling auto-typecasting
Merge branch 'master' of https://github.com/soumith/cuda-convnet2.torch
Merge branch 'master' of https://github.com/soumith/cuda-convnet2.torch into branches/locally_connected_patch