Refactor changes module to allow for accumulators with the callback (optional, doesn't break public API).
Refactor changes module to allow for accumulators with the callback (optional, doesn't break public API).


git-svn-id: c1f8a8ec0b3bb2e99ab3413722f81f687760e79c@995528 13f79535-47bb-0310-9956-ffa450edef68

KlausTrainer/couchdb-couch,ngpestelos/couchdb-couch,cloudant/couchdb-couch,fkaempfer/couchdb,apache/couchdb-couch,alanning/couchdb-couch,fkaempfer/couchdb,fkaempfer/couchdb,ngpestelos/couchdb-couch,KlausTrainer/couchdb-couch,smithsz/couchdb-couch,apache/couchdb-couch,fkaempfer/couchdb,apache/couchdb-couch,alanning/couchdb-couch,cloudant/couchdb-couch,fkaempfer/couchdb,fkaempfer/couchdb,smithsz/couchdb-couch,smithsz/couchdb-couch,KlausTrainer/couchdb-couch,ngpestelos/couchdb-couch,alanning/couchdb-couch,cloudant/couchdb-couch