Create the default dataset directory. Insure the dataset folders wouldn't be created if it already existed.
Changed preprocess logic to follow python's capacities.
Changed preprocess logic to follow python's capacities.
Corrected a small mistake in the splits of the test case.
Removed a nonsensical test.
Corrected split argument in a test
Corrected how h5py is called to store a ndarray.
Small corrections in tests
Changed preprocess functions to named function as lambdas can't be pickled.
Corrected tests to reflect read-only datasets
Corrected errors in dataset loading
Added a method to remove a dataset.
Insured datasets were cleaned after tests.
Corrected hashing of function to account for the difference between h5py and numpy arrays.