OData/odata.net 6.13.0 on GitHub

New Features:

- [Support writing NextPageLink/Count instance annotation in top-level collection of complex type payload](http://odata.github.io/odata.net/#6-08-nextpagelinkAndCountForCollection). #140, PR #166 by [chinese007](https://github.com/chinese007) - [Allow serialization of additional properties](http://odata.github.io/odata.net/#6-11-allow-serialization-of-additional-pproperties). #179, PR #218 by [gkasturi](https://github.com/gkasturi) - [Add the alternate key support](http://odata.github.io/odata.net/#6-06-alternatekey). #55, PR #219 by [Abhishek Kumar](https://github.com/abkmr) - [Add the capabilities vocabulary support](http://odata.github.io/odata.net/#6-07-capabilitiesVocabulary). #152, PR #232

Bug Fixes:

- Fix race condition in EnumHellper.TryParseEnum. #216, PR #235

Doc site: http://odata.github.io/odata.net/#ODL-6.13.0
Nuget: https://www.nuget.org/packages/Microsoft.OData.Core/6.13.0