godep: vendor correctly.

I'm so sick of this absolute crap. It goes wrong all the time.
I want to get off godeps soon. But for now, let's **please**
setup a test on travis that exercises all sorts of godep things
to avoid merging anything that will break.

Maybe we can fail the build if any library is NOT vendored.

Godeps/Godeps.json

@@ -176,10 +176,6 @@
 			"ImportPath": "github.com/jbenet/go-is-domain",
 			"Rev": "93b717f2ae17838a265e30277275ee99ee7198d6"
 		},
-		{
-			"ImportPath": "github.com/jbenet/go-logging",
-			"Rev": "128b9855511a4ea3ccbcf712695baf2bab72e134"
-		},
 		{
 			"ImportPath": "github.com/jbenet/go-msgio",
 			"Rev": "dbae89193876910c736b2ce1291fa8bbcf299d77"
@@ -255,6 +251,10 @@
 			"ImportPath": "github.com/syndtr/gosnappy/snappy",
 			"Rev": "156a073208e131d7d2e212cb749feae7c339e846"
 		},
+		{
+			"ImportPath": "github.com/whyrusleeping/go-logging",
+			"Rev": "128b9855511a4ea3ccbcf712695baf2bab72e134"
+		},
 		{
 			"ImportPath": "github.com/whyrusleeping/go-metrics",
 			"Rev": "1cd8009604ec2238b5a71305a0ecd974066e0e16"

Godeps/_workspace/src/github.com/whyrusleeping/go-logging/examples/example.go

@@ -3,7 +3,7 @@ package main
 import (
 	"os"
 
-	"github.com/whyrusleeping/go-logging"
+	"github.com/ipfs/go-ipfs/Godeps/_workspace/src/github.com/whyrusleeping/go-logging"
 )
 
 var log = logging.MustGetLogger("example")