Fix path to brain atlas data.
Fix file paths for the matplotlib imshow tutorial.
Tweaks to the imshow tutorial.
Rewrite Transforms and Resampling.

Do not require data or ANTS.  Significantly expand.
Update Levelset Segmentation for new data paths.
Merge branch 'Montreal'
Add additional links to download Visible human data.
Merge remote-tracking branch 'github-isc/master'
Adding ignore for the ipnb checkpoints
Update URL links for to github io pages on ICS
Remove pylab, in favor of explicit matplotlib inline
Add interactive widgets for watershed segmentation level