Added zca_whitening option to smallnorb.
Added zca_whiten option to mnist and smallnorb.
Tidied ZCA whitening code

Removed redundant functions, fixed whitespace.
Merge branch 'master' into zca
Added global normalisation and ZCA whitening to table_datset
Completed global normalisation and ZCA whitening
Fixes to ZCA whitening
Changed parameter names for smallnorb
Merge branch 'master' of github.com:rosejn/torch-datasets
Merge pull request #15 from koraykv/master

image and video datasets that can use bunch of files in a directory
Merge pull request #16 from koraykv/master

add documentation
changing doc examples using scaler to resizer
Merge branch 'master' of github.com:rosejn/torch-datasets
image_loader width/height dims order was wrong
imageset creates a dataset, not just a function call for better handling of data.
introduced pipe.batch_loader_source and pipe.cached_loader_source.
Similar to TableDataset, but does not assume data is a tensor
Merge remote-tracking branch 'upstream/master'

Conflicts:
	dataset/pipeline.lua