Blender Git Loki

Moved object/modifier/sim resets out of the BKE_ptcache_id_reset
function. This is a design cleanup, the point cache methods should only
write to the DNA when retrieving state data. There were already a number
of cases where such resets occured outside of this function (such as
with rigid body worlds or smoke sims).

The BKE_ptcache_object_reset function still exists and includes these
reset calls, but there the cache user data types are accessed directly.