ENH: Add extra octree functionality

+ Make intersection and nearest functions functors. This makes adding
  different intersection and nearest routines easier.
+ treeDataPrimitivePatch takes its tolerance as a constructor argument
+ Make treeDataTriSurface a typedef of treeDataPrimitivePatch

Conflicts:
	src/OpenFOAM/algorithms/indexedOctree/indexedOctree.C
	src/meshTools/AMIInterpolation/AMIInterpolation/AMIInterpolation.C
	src/meshTools/indexedOctree/treeDataTriSurface.C