Merge pull request #479 from andreabalducci/explaindetails

Added detail

Author: Mpdreamz

Diff for: src/Nest/Domain/Hit/ExplanationDetail.cs

@@ -13,5 +13,7 @@ public class ExplanationDetail
 		public float Value { get; internal set; }
 		[JsonProperty(PropertyName = "description")]
 		public string Description { get; internal set; }
+        [JsonProperty(PropertyName = "details")]
+        public IEnumerable<ExplanationDetail> Details { get; set; }
 	}
 }