Revert "Remove old RsitkTypes"

This reverts commit 71c5ad1c92f9527face3409b2da26b0d7703633c.

Change-Id: I296c01284a7873b900810af12a0a244de9c51b6c
Merge topic 'SIMPLEITK-294_UsePixelIDValueEnum' into next

45d9acf Revert "Remove old RsitkTypes"