[Bf-codereview] Normalize Node - Tile (issue 5576078)

[dfelinto at gmail.com]

Reviewers: bf-codereview_blender.org, jbkkavt,

Description:
as discussed during IRC the normalize node for tile.

The implementation is simple. Fancy alternatives to gather the minimum
and maximum through recursive loop in the tiles proved inefficient
(Jeroen Bakker's tests/words).


Please review this at http://codereview.appspot.com/5576078/

Affected files:
   source/blender/compositor/CMakeLists.txt
   source/blender/compositor/intern/COM_Converter.cpp
   source/blender/compositor/nodes/COM_NormalizeNode.cpp
   source/blender/compositor/nodes/COM_NormalizeNode.h
   source/blender/compositor/operations/COM_NormalizeOperation.cpp
   source/blender/compositor/operations/COM_NormalizeOperation.h
   source/blender/compositor/operations/COM_TonemapOperation.cpp