Merge ethereum/poc-9 into accounts-integration

Conflicts:
	cmd/utils/cmd.go
	cmd/utils/flags.go
	core/manager.go
	eth/backend.go
	rpc/http/server.go
	xeth/xeth.go

core/manager.go

@@ -13,6 +13,7 @@ type Backend interface {
 	PeerCount() int
 	IsListening() bool
 	Peers() []*p2p.Peer
-	Db() ethutil.Database
+	BlockDb() ethutil.Database
+	StateDb() ethutil.Database
 	EventMux() *event.TypeMux
 }