Merge pull request #105 from andrewlock/update-docs-for-yaml-package

Added Yaml to table of contents

Author: filipw

README.md

@@ -23,6 +23,7 @@ WebAPIContrib.Core is a collection of open source projects, add-ons and extensio
 * [WebApiContrib.Core.Formatter.Jsonp](https://github.com/WebApiContrib/WebAPIContrib.Core/tree/master/src/WebApiContrib.Core.Formatter.Jsonp) [![Nuget](http://img.shields.io/nuget/v/WebApiContrib.Core.Formatter.Jsonp.svg?maxAge=10800)](https://www.nuget.org/packages/WebApiContrib.Core.Formatter.Jsonp/)
 * [WebApiContrib.Core.Formatter.MessagePack](https://github.com/WebApiContrib/WebAPIContrib.Core/tree/master/src/WebApiContrib.Core.Formatter.MessagePack) [![Nuget](http://img.shields.io/nuget/v/WebApiContrib.Core.Formatter.MessagePack.svg?maxAge=10800)](https://www.nuget.org/packages/WebApiContrib.Core.Formatter.MessagePack/)
 * [WebApiContrib.Core.Formatter.Protobuf](https://github.com/WebApiContrib/WebAPIContrib.Core/tree/master/src/WebApiContrib.Core.Formatter.Protobuf) [![Nuget](http://img.shields.io/nuget/v/WebApiContrib.Core.Formatter.Protobuf.svg?maxAge=10800)](https://www.nuget.org/packages/WebApiContrib.Core.Formatter.Protobuf/)
+* [WebApiContrib.Core.Formatter.Yaml](https://github.com/WebApiContrib/WebAPIContrib.Core/tree/master/src/WebApiContrib.Core.Formatter.Yaml) [![Nuget](http://img.shields.io/nuget/v/WebApiContrib.Core.Formatter.Yaml.svg?maxAge=10800)](https://www.nuget.org/packages/WebApiContrib.Core.Formatter.Yaml/)
 
 ## TagHelpers
 * [WebApiContrib.Core.TagHelpers.Markdown](https://github.com/WebApiContrib/WebAPIContrib.Core/tree/master/src/WebApiContrib.Core.TagHelpers.Markdown) [![Nuget](http://img.shields.io/nuget/v/WebApiContrib.Core.TagHelpers.Markdown.svg?maxAge=10800)](https://www.nuget.org/packages/WebApiContrib.Core.TagHelpers.Markdown/)