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
Haxby example, this time with l1-logistic

Same example as plot_haxby_full_analysis.py, but using l1-logistic
instead. I've made two small changes to plot_haxby_full_analysis.py
to make the comparison easier to interpret: fix the vmax so that
both are in the same scale and put a title in the plot.
Rename log_l1 to different estimators
Merge branch 'pr_148'

Conflicts:
	plot_haxby_full_analysis.py
BUG: error msg in check_niimgs

The right error was raised, but for the wrong reason
DOC: add example difference estimators
ENH: Add example of multi-class prediction
DOC: multi-class prediction
DOC: iter on estimator choice
No standardization by default in NiftiMasker
DOC: multiple estimators
Standardizing in decoding
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