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
TST: in travis, remove Py 2.6

It wasn't working anyhow, because the 'deactivate' was
having us fall back to Py 2.7
Merge branch 'master' of https://github.com/nilearn/nilearn into mask_closing
ENH: respect dtype in masking
ENH: cache flushing for changing nibabel version
BUG: fix caching bug
ENH: save file in example
changed SVD to EVD for high_variance_confounds (+ tagging optional arguments)
minimal memory optimization tweaks
BUG: fix nyu downloader
Merge pull request #156 from GaelVaroquaux/fix_datasets

BUG: fix nyu downloader
Merge pull request #155 from rphlypo/min_mem_tweaks

Min mem tweaks
Remove a tab!
PEP8 compliance
clarified docstring as per the request of G. Varoquaux
autoPEP8
deleted docstring on absent feature