RF: Adjust tutorial startup script (no results in latest data tarball)
DOC: Adjust mappers tutorial to use openfmri-based dataset
RF: Adjust tutorial data_generator helper to use openfmri dataset
RF: Update example to pull anatomical file from openfmri dataset
RF: Use helper functions to load example data

This also limits the direct use of attributes.txt and should help to rip
it out later more easily.
RF: Use helper for openfmri key conversion
RF: Dedicated function to get info on model conditions
BF: Support partial condition info per run
NF: Convert event lists to sample attr with evds() API
NF: Load entire openfmri dataset with a single call
RF: Adjust for new openfmri dataset input.