cropping
cropping
added 1 voxel padding and altered tests correspondingly
Added docstrings
added crop_img to nilearn.image.__init__.all
Added cropping before masking in the case where masking necessitates resampling. Also resampling in filter_and_mask is now done explicitely on the parameters of the mask and not the ones specified in 'parameters'
Add details to the standardize argument in the nifti maskers
COSMIT incorporated Gael's comments
Merge pull request #121 from eickenberg/cropping_function

MRG: Cropping function