Support for geo_shape attribute based mapping

Author: gmarz

src/Nest/Enums/FieldType.cs

@@ -25,6 +25,11 @@ public enum FieldType
 		[EnumMember(Value = "geo_point")]
 		GeoPoint,
 		/// <summary>
+		/// Geo shape type.
+		/// </summary>
+		[EnumMember(Value = "geo_shape")]
+		GeoShape,
+		/// <summary>
 		/// The attachment type allows to index different “attachment” type field (encoded as base64), for example, microsoft office formats, open document formats, ePub, HTML...
 		/// </summary>
 		[EnumMember(Value = "attachment")]

src/Nest/Resolvers/Writers/TypeMappingWriter.cs

@@ -211,6 +211,8 @@ private string GetElasticSearchTypeFromFieldType(FieldType? fieldType)
 			{
 				case FieldType.GeoPoint:
 					return "geo_point";
+				case FieldType.GeoShape:
+					return "geo_shape";
 				case FieldType.Attachment:
 					return "attachment";
 				case FieldType.Ip: