[Insight-developers] typedef name changes

[Will Schroeder]

Hi Folks-

I've changed several typedef names. In itkImage and itkImageRegion I changed

  Region to RegionType
  Index to IndexType
  Size to SizeType

I've tried to fix the filters, code, and tests that depend on these 
typedefs, but without 100% compilation
it's easy to miss something.

Will