Merge branch 'refactor/aggs-metadata'

Author: russcam

src/Nest/Aggregations/Aggregate.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Nest
+{
+	/// <summary>
+	/// Represents the result of an aggregation on the response
+	/// </summary>
+	[ExactContractJsonConverter(typeof(AggregateJsonConverter))]
+	public interface IAggregate
+	{
+		IDictionary<string, object> Meta { get; set; }
+	}
+}