added core logging

core/core.go

@@ -9,6 +9,7 @@ import (
 	ds "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/datastore.go"
 	b58 "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-base58"
 	ma "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-multiaddr"
+	logging "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/op/go-logging"
 
 	bserv "github.com/jbenet/go-ipfs/blockservice"
 	config "github.com/jbenet/go-ipfs/config"
@@ -27,6 +28,8 @@ import (
 	u "github.com/jbenet/go-ipfs/util"
 )
 
+var log = logging.MustGetLogger("core")
+
 // IpfsNode is IPFS Core module. It represents an IPFS instance.
 type IpfsNode struct {