add items to dag api

Author: kevodwyer

src/main/java/io/ipfs/api/IPFS.java

@@ -696,6 +696,14 @@ public MerkleNode put(String inputFormat, byte[] object, String outputFormat) th
             String res = m.finish();
             return MerkleNode.fromJSON(JSONParser.parse(res));
         }
+
+        public Map resolve(String path) throws IOException {
+            return retrieveMap("dag/resolve?&arg=" + path);
+        }
+
+        public Map stat(Cid cid) throws IOException {
+            return retrieveMap("dag/stat?&arg=" + cid);
+        }
     }
 
     public class Diag {

src/test/java/io/ipfs/api/APITest.java

@@ -33,6 +33,10 @@ public void dag() throws IOException {
 
         byte[] get = ipfs.dag.get(expected);
         Assert.assertTrue("Raw data equal", original.equals(new String(get).trim()));
+        Map res = ipfs.dag.resolve("bafyreidbm2zncsc3j25zn7lofgd4woeh6eygdy73thfosuni2rwr3bhcvu");
+        Assert.assertTrue("not resolved", res != null);
+        res = ipfs.dag.stat(expected);
+        Assert.assertTrue("not found", res != null);
     }
 
     @Test