writeAddSubtractField.C: explicitly dereference tmp to keep clang3.2 happy

         Modification of shootRays algorithm. Rays that hit themselfs are continued
 	 until they hit(or not) the agglomeration target. If they do the surfaces can see
	 each other.
     faceAgglomerate:
	 The agglomeration now stops when the global nCoarse is reached (not per-processor)

VoF Solvers: Relocate the correction, sub-cycling and compressions controls from PIMPLE to the alpha1 sub-dict
MULES: Add support for explicit correction
interPhaseChangeFoam: Add option for explicit MULES or as correction to an upwind solution
Deprecate implicit form of MULES

Matches boundary edges between surfaces by retriangulating edges.

ENH: Migrated stochastic collision models from spray to kinematic clouds, refactored and added models