Improve replication logging and status report
Improve replication logging and status report

When resuming a replication, log and report what's the start
sequence number (stored in latest checkpoint)


git-svn-id: c1f8a8ec0b3bb2e99ab3413722f81f687760e79c@1138964 13f79535-47bb-0310-9956-ffa450edef68

fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb,fkaempfer/couchdb