switch to go-buffer-pool

It has a nicer interface and we don't even need the rest of the msgio

Prereq for: https://github.com/libp2p/go-msgio/pull/9

package.json

@@ -12,12 +12,6 @@
       "name": "go-log",
       "version": "1.5.7"
     },
-    {
-      "author": "jbenet",
-      "hash": "QmWBug6eBS7AxRdCDVuSY5CnSit7cS2XnPFYJWqWDumhCG",
-      "name": "go-msgio",
-      "version": "0.0.3"
-    },
     {
       "author": "whyrusleeping",
       "hash": "QmZooytqEoUwQjv7KzH4d3xyJnyvD3AWJaCDMYt5pbCtua",
@@ -35,6 +29,12 @@
       "hash": "QmRcHuYzAyswytBuMF78rj3LTChYszomRFXNg4685ZN1WM",
       "name": "go-block-format",
       "version": "0.2.0"
+    },
+    {
+      "author": "Stebalien",
+      "hash": "QmUQy76yspPa3fRyY3GzXFTg9n8JVwFru6ue3KFRt4MeTw",
+      "name": "go-buffer-pool",
+      "version": "0.1.1"
     }
   ],
   "gxVersion": "0.12.1",

splitting.go

@@ -8,7 +8,7 @@ import (
 	"io"
 
 	logging "github.com/ipfs/go-log"
-	mpool "github.com/libp2p/go-msgio/mpool"
+	pool "github.com/libp2p/go-buffer-pool"
 )
 
 var log = logging.Logger("chunk")
@@ -82,19 +82,19 @@ func (ss *sizeSplitterv2) NextBytes() ([]byte, error) {
 		return nil, ss.err
 	}
 
-	full := mpool.ByteSlicePool.Get(ss.size).([]byte)[:ss.size]
+	full := pool.Get(int(ss.size))
 	n, err := io.ReadFull(ss.r, full)
 	switch err {
 	case io.ErrUnexpectedEOF:
 		ss.err = io.EOF
 		small := make([]byte, n)
 		copy(small, full)
-		mpool.ByteSlicePool.Put(ss.size, full)
+		pool.Put(full)
 		return small, nil
 	case nil:
 		return full, nil
 	default:
-		mpool.ByteSlicePool.Put(ss.size, full)
+		pool.Put(full)
 		return nil, err
 	}
 }