refactor couch_replicator. close #COUCHDB-1323 .
refactor couch_replicator. close #COUCHDB-1323 .

Move all modules under couch_replicator namespace

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