Update 2.0.md

Author: infolock

versions/2.0.md

@@ -7,13 +7,15 @@ The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "S
 
 The Swagger specification is licensed under [The Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0.html).
 
-## Introductions
+##### Table of Contents  
+
+[Introductions](## Introductions)
 
 Swagger™  is a project used to describe and document RESTful APIs.
 
 The Swagger specification defines a set of files required to describe such an API. These files can then be used by the Swagger-UI project to display the API and Swagger-Codegen to generate clients in various languages. Additional utilities can also take advantage of the resulting files, such as testing tools.
 
-## Revision History
+[Revision History](## Revision History)
 
 Version | Date | Notes
 --- | --- | ---
@@ -22,7 +24,7 @@ Version | Date | Notes
 1.1 | 2012-08-22 | Release of Swagger 1.1
 1.0 | 2011-08-10 | First release of the Swagger Specification
 
-## Definitions
+[Definitions](## Definitions)
 
 ##### <a name="pathTemplating"></a>Path Templating
 Path templating refers to the usage of curly braces ({}) to mark a section of a URL path as replaceable using path parameters.