Same changes to filename generation as 65.
Same changes to filename generation as 65.

Also modified a bit of the sitk multiscale code as follows:

1) Not passing in lists of one image - slight changes in calls to
   construct the smoothed, resampled lists.
2) Replaced one of the map calls with a loop, as it is propogating
   results from one iteration to the next. This gets rid of the <<-
   operation, which can be dangerous. No need to overuse the functional
   programming tools when it isn't appropriate. I think a traditional
   loop is simpler here.

zivy/SimpleITK-Notebooks,InsightSoftwareConsortium/SimpleITK-Notebooks,InsightSoftwareConsortium/SimpleITK-Notebooks,InsightSoftwareConsortium/SimpleITK-Notebooks,zivy/SimpleITK-Notebooks,zivy/SimpleITK-Notebooks