Blender Git Loki

Cleanup: Removed the unnecessary cloth solver abstraction (there is only
one solver anyway), and split some particle cloth functions for clarity.

Conflicts:
source/blender/blenkernel/BKE_particle.h
source/blender/blenkernel/intern/particle_system.c
source/blender/blenloader/intern/versioning_270.c
source/blender/makesdna/DNA_particle_types.h
source/blender/makesrna/intern/rna_particle.c