+ Move most of the octree searching functionality from triSurfaceMesh into
  triSurfaceSearch. Much of it was duplicated anyway.
+ Add triSurfaceRegionSearch, which constructs an octree for each region in
  a surface and performs searches on specified regions only.

+ Remove tolerance based method for finding intersections and use the
  new method of masking previously hit shapes from the octree.

+ 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

IMULES: MULES for implicit solution

     Adding mininum area tolerance in processSourceFace function to calculate weight
     Modifying calculation of face normals in function interArea

interPhaseChangeFoam: corrected handling of alpha1 for transport and updated for consistency with interFoam