Merge pull request #58 from pakozm/devel

Solved bug at table.insert
Changes in loss functions for CUDA
Added step method to iterator, and modified math.median computation
Merge pull request #60 from pakozm/devel

Pull request with the PRE-RELEASE for April-ANN v0.3.1-beta
Updated version
Improved bootstrap and confidence interval computation
Simplified datasetToken, removing bunch_major property
Updated gtk tool, and pca whitening
Debugging ZCA whitening
Updated PCA code
Solved problem with Lua stack at StackANNComponent:unroll() method
Added is_best method to holdout training class
Added posibility of take-n components in PCA whitening
Added PCA and ZCA whitening ANN components
More for PCA analysis
sanity check
Implementing PCA and ZCA whitening ANN components as DotProductANNComponent wrappers
Added ZCA test
Solved problem in method clone of confussion matrix
modified changes list