Don't attach snapshot node to parent if created for a read transaction.
Merge branch 'daniel_2164_2' into next
Merge branch 'next' of github.com:rethinkdb/rethinkdb into next
Don't attach snapshot node to parent if created for a read transaction.
Merge branch 'v1.12.x' into next
Merge branch 'sam_803' into sam_803_dummy