enable statistics on REST
Implement changes_left

1. fix racing in consecutive rest calls
2. fix bug in statistics manager

fixing merging issue

update README.md

Remove unused file

Change-Id: I920848bb03874f7c4c06d2b1aa1a448699fc4769

remove debug logging

fake update

Change-Id: I863be478bb2d60d1bbe5fa179cecb590af8dc208

Conflicts:
	replication_manager/adminport.go
	replication_manager/replication_manager.go

Change-Id: Ic9ceef2883acdca807b470d62687150d9b86a93c

Change-Id: I95d108dcedad8adca5f09bb85444cd5ea96b4d34
Reviewed-on: http://review.couchbase.org/44211
Reviewed-by: Xiaomei Zhang <xiaomeizhangatwork@gmail.com>
Tested-by: Xiaomei Zhang <xiaomeizhangatwork@gmail.com>