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
cleanups
Merge branch 'master' of github.com:rosejn/torch-datasets
type function should check for sample == nil.
add randomization to file_source
Completed global normalisation and ZCA whitening
add filtered pipeline to accept/reject samples
Fixes to ZCA whitening
Changed parameter names for smallnorb
Merge branch 'master' of github.com:rosejn/torch-datasets
add imageset data. It takes a directory full of images and returns a dataset over them.
Label information is missing for now.
add image and video handling
video and image dataset that can go over bunch of files in a directory
Merge pull request #15 from koraykv/master

image and video datasets that can use bunch of files in a directory
documentation
make std_thres 0 by default
correct bug: read new file when the current one is done.