Fullcalendar drag and drop doesn't trigger node_save()

Under normal use, not triggering node_save() works fine. However, when using Entity Cache, this presents quite a problem, as the entity cache is not cleared. Similarly, when using Cache Actions to manage the full calendar view cache, there is no way to set up a rule (w/o custom code) to properly clear the cache.

I'm not sure the best approach to take on the entity cache issue. For the rules issue, a patch could be provided to that module to trigger off of field_attach_presave, instead of node_save, since node_save calls that function.