Merge pull request #1064 from brianpeiris/patch-1

Add table of contents

API.md

 # Flot Reference #
 
+**Table of Contents**
+
+[Introduction](#introduction)
+| [Data Format](#data-format)
+| [Plot Options](#plot-options)
+| [Customizing the legend](#customizing-the-legend)
+| [Customizing the axes](#customizing-the-axes)
+| [Multiple axes](#multiple-axes)
+| [Time series data](#time-series-data)
+| [Customizing the data series](#customizing-the-data-series)
+| [Customizing the grid](#customizing-the-grid)
+| [Specifying gradients](#specifying-gradients)
+| [Plot Methods](#plot-methods)
+| [Hooks](#hooks)
+| [Plugins](#plugins)
+| [Version number](#version-number)
+
+---
+
+## Introduction ##
+
 Consider a call to the plot function:
 
 ```js