[Bf-codereview] Double Edge Matte (issue 5523046)

[xgl.asyliax at gmail.com]

Reviewers: bf-codereview_blender.org,

Description:
Double Edge Matte composite node.

Please review this at http://codereview.appspot.com/5523046/

Affected files:
   source/blender/blenkernel/BKE_node.h
   source/blender/blenkernel/intern/node.c
   source/blender/editors/space_node/drawnode.c
   source/blender/makesrna/RNA_access.h
   source/blender/makesrna/intern/rna_nodetree.c
   source/blender/makesrna/intern/rna_nodetree_types.h
   source/blender/nodes/CMakeLists.txt
   source/blender/nodes/NOD_composite.h
   source/blender/nodes/composite/nodes/node_composite_dblEdgMatte.c