Update 2.0.md

Author: webron

versions/2.0.md

@@ -1,12 +1,13 @@
-# Swagger RESTful API Documentation Specification
+# OpenAPI Specification
+## (fka Swagger RESTful API Documentation Specification)
 
 #### Version 2.0
 
 The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC 2119](http://www.ietf.org/rfc/rfc2119.txt).
 
 The Swagger specification is licensed under [The Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0.html).
 
-## Introduction
+## Introductions
 
 Swagger™  is a project used to describe and document RESTful APIs.