Add DbGeography to predefined types to allow advanced spatial queries. (#135)

Author: czielin

src/System.Linq.Dynamic.Core/Parser/ExpressionParser.cs

@@ -73,6 +73,7 @@ void InitPredefinedTypes()
             //EF6,System.Data.Entity.DbFunctionAttribute
             _predefinedTypesHelper.TryAdd("System.Data.Entity.Core.Objects.EntityFunctions, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089", 2);
             _predefinedTypesHelper.TryAdd("System.Data.Entity.DbFunctions, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089", 2);
+            _predefinedTypesHelper.TryAdd("System.Data.Entity.Spatial.DbGeography, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089", 2);
             _predefinedTypesHelper.TryAdd("System.Data.Entity.SqlServer.SqlFunctions, EntityFramework.SqlServer, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089", 2);
             _predefinedTypesHelper.TryAdd("System.Data.Entity.SqlServer.SqlSpatialFunctions, EntityFramework.SqlServer, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089", 2);
 #endif