keep track (in mem) of pending ways and rels due to node changes
hook up a bunch of the other scenarios in which ways or rels get marked pending (in memory)
hook up in memory tracker for actually sending pending items to the outputs/backends
clean out in db pending ways and rels for middle. still one more round of cleanup to do with actual table def and prepared statements
Merge remote-tracking branch 'origin/kk_multiback' into kk_multiback