update mr utils for update to scipy

```
  >>> standard_mask=get_standard_mask(4)
  /home/vsochat/.local/lib/python2.6/site-packages/scipy/ndimage/interpolation.py:435: UserWarning: The behaviour of affine_transform with a one-dimensional array supplied for the matrix parameter will change in scipy 0.18.0.
    "The behaviour of affine_transform with a one-dimensional "
```
