ENH: Use itkMacro.h instead of tubeMacro.h

tubeMacro.h is very rarely used and itkMacro.h contains at least the same
functionality, so always use itkMacro.h.

Change-Id: Ic8a0293aaffc605cc4b9c94a90d6b5b4ea995fdf
Merge topic 'UseITKMacro'

038812d ENH: Use itkMacro.h instead of tubeMacro.h
ENH: Add markdown formatted README and LICENSE and update acknowledgements

Acknowledgements have also been updated in NIH format

http://grants.nih.gov/grants/acknow.htm

using the list on public wiki

http://public.kitware.com/Wiki/TubeTK/About

Change-Id: I191c3da0c0047a1cabd90640b5295e748843b5f1