Add the hash lookup handler.

src/main/java/io/kamax/mxisd/lookup/HashLookupRequest.java

@@ -0,0 +1,16 @@
+package io.kamax.mxisd.lookup;
+
+import java.util.List;
+
+public class HashLookupRequest extends ALookupRequest {
+
+    private List<String> hashes;
+
+    public List<String> getHashes() {
+        return hashes;
+    }
+
+    public void setHashes(List<String> hashes) {
+        this.hashes = hashes;
+    }
+}