Keep namespace and timestamp metadata in a separate Elasticsearch index.
Yield both document and meta-document actions in the same generator for bulk_upsert into Elasticsearch.
Remove redundant _id in meta document for regular upsert using the Elastic DocManager.
prevent data loss when collection_dump=False
create new cursor if cursor.count() fails
fixed oplogmanager exception handling and tests
Ignore oplog entries that don't have a namespace
ignore error if index already exists
update CHANGELOG.rst
BUMP 1.3
version -> .dev0
include deleted documents in rollback set