Add the column filter functions.
Add ABIDE fetching function
Add tests for fetch_abide and column filtering
Add simple smoothing and use it in find_cut_slices rather than a gaussian filter
Missing space
Fix typo
Replace mask parameter of masker by mask_img.
Fix MultiPCA test
3D checking as already been done a few lines above through check_niimg with ensure_3d=True

Minor whitespace alignment
Fix false positive in mask -> mask_img replacement
Merge pull request #242 from lesteve/unnecessary-3d-checking-in-plot-img-with-bg

Unnecessary 3D checking in _plot_img_with_bg
Add test for check_niimg with ensure_3d=True and non-3d image as argument

Fix missing space and typo in error message
PEP8 tweak while I was touching the file
Add missing space
Merge pull request #243 from lesteve/add-test-for-check-niimg-with-non-3d-image

Add test for check_niimg with ensure_3d=True and a non 3d image as argument
Add fast smoothing when fwhm='fast' in image.smooth_img

* Fast smoothing has been moved from plotting.find_cuts to image.image
* Test have been added for fast smoothing
* Fix buglet where data was only smoothed in find_cuts for integer arrays
Tweak documentation and rename data -> arr for consistency
DOC: make _fast_smooth_array documentation more consistent with _smooth_array
Reduce the number of multiplications in _fast_smooth_array
Make provenance of the expected result a tad less magical