Add toc commets

Author: mgechev

README.md

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 # AngularJS in Patterns
 
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 ## Table of Contents
 
 * [Abstract](#abstract)
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  * [Data Mapper](#data-mapper)
 * [References](#references)
 
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 ## Abstract
 
 One of the best ways to learn something new is to see how the things you already know are used in it.