Adding support for vector image source image for warp filter.

Updating dual dispatch template to support only one vector by
component input.

Change-Id: Ib041047955a573b079804ea4a7da3642f230894e
Adding test for vector image for warp filter

Change-Id: I3b599549c072bd2d982f45e5a3e718cb4a242674
Merge topic 'SIMPLEITK-433_AddWarpImageFilter' into next

2438f46 Adding test for vector image for warp filter
1f57166 Adding support for vector image source image for warp filter.