ENH: respect dtype in masking
ENH: cache flushing for changing nibabel version
BUG: fix caching bug
ENH: save file in example
added a closing operation to the masker to avoid 'gaps' in the mask
merged opening and closing into the single parameter opening
changed parameters in nifti-masker to only keep opening
changed parameters in nifti-masker to only keep opening & removed trailing tab-character on blank line
changed SVD to EVD for high_variance_confounds (+ tagging optional arguments)
minimal memory optimization tweaks