Updated ITK super build to tag v4.6.0

Change-Id: Id21d2a659b7ced31d4b3d562705b948f3c3fbb69
ITKv4.6 changes the results, renaming old baseline

A new feature to this filter was added, which preserves the geometric
and coordinates of the output image. This requires the baseline to be
updated (next patch). Here we rename the old baseline with the ".1" so
it can be used as an alternative with support is added to the test
infrastructure.

Change-Id: I66b5c8b5f1cd84262db3402904742bd370af9951
Update FFTConvolution baseline for change in origin

The ITK filter has been updated to correctly respect the output
origin.

Change-Id: I5b4b1a96223cec5669b9b5c253185d456ddde42f
Merge branch 'SIMPLEITK-569_UpdateToITKv4.6.0' into release

Change-Id: I0e9207dc2cc8ad68eed1ffe2b668aab01cec056f