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First functional version that actually does some transforms
Transform points in opposite direction if that is the only Bridging Reg available

* note that by CMTK convention the default mapping of points from 
  floating to reference is considered the inverse xform
* therefore in this case the inverse xform is the default as well.
Make FCWB->JFRC2 the default transformation
Fix column names when there are 4 cols
Cosmetic changes
Really make FCWB and JFRC2 brains the default
Cope with identity transformation