1. Replication Manager
2. XDCRFactory refactor
3. metadata services interface
4. metadata
5. pipeline_sv skeleton
Merge branch 'master' of
https://github.com/Xiaomei-Zhang/couchbase_goxdcr_impl

Conflicts:
	base/xdcr_config.go
	factory/xdcr_factory.go
	replicationmanager/adminport.go
	replicationmanager/replication_manager.go
	utils/utils.go
# WARNING: head commit changed in the meantime

Merge branch 'master' of
https://github.com/Xiaomei-Zhang/couchbase_goxdcr_impl

Conflicts:
	base/xdcr_config.go
	factory/xdcr_factory.go
	replicationmanager/adminport.go
	replicationmanager/replication_manager.go
	utils/utils.go
refactor adminport