type function should check for sample == nil.
add randomization to file_source
add filtered pipeline to accept/reject samples
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