COMP: Bump SCIFIO to fix test build warnings

https://github.com/scifio/scifio-imageio/commit/789c08071bbcd4341eba76fda10582a8d5fb7626

Fixes the following warnings when the tests are built:
warning: typedef 'PixelType' locally defined but not used
warning: typedef 'ImageType' locally defined but not used

Change-Id: I5ef63e317cadc6c09fec10cb95a2abbaa3886e2c
COMP: Fix wrapping of itkImageFunctionBase

Add unsigned short type for RGB and RGBA.
Fixes warnings like:
Warning 401: Nothing known about base class 'itk::ImageFunction< itk::Image< itk::RGBAPixel< unsigned short >,2u >,itk::RGBAPixel< double >,double >'. Ignored.

See bug ITK-3333

Change-Id: Icfc1b62ed62f1afaf2d77513d07d9de7872c3031
Merge topic 'FixInterpolate2'

921c28bb COMP: Fix wrapping of itkImageFunctionBase
Merge topic 'BumpScifio'

8016bfe8 COMP: Bump SCIFIO to fix test build warnings