ipfs object has learned stat

'ipfs object stat' is a plumbing command to print DAG
node statistics. <key> is a base58 encoded multihash.
It outputs to stdout:

  NumLinks        int number of links in link table
  BlockSize       int size of the raw, encoded data
  LinksSize       int size of the links segment
  DataSize        int size of the data segment
  CumulativeSize  int cumulative size of object and references

node.go

@@ -27,10 +27,10 @@ type Node struct {
 // NodeStat is a statistics object for a Node. Mostly sizes.
 type NodeStat struct {
 	NumLinks       int // number of links in link table
-	BlockSize      int // size of the raw data
+	BlockSize      int // size of the raw, encoded data
 	LinksSize      int // size of the links segment
 	DataSize       int // size of the data segment
-	CumulativeSize int // cumulatie size of object + all it references
+	CumulativeSize int // cumulative size of object and its references
 }
 
 func (ns NodeStat) String() string {