Update README.md

Author: Carmine DiMascio

README.md

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 ![Travis Build](https://travis-ci.org/cdimascio/py-readability-metrics.svg?branch=master) ![Python](https://img.shields.io/badge/python-%203.4%20%7C%203.5%20%7C%203.6-blue.svg) [![MIT license](https://img.shields.io/badge/License-MIT-green.svg)](https://lbesson.mit-license.org/)
 
-Score the _readability_ of text using popular readability metrics including: Flesch-Kincaid Grade Level, Flesch Reading Ease, Gunning Fog Index, Dale Chall Readability, Automated Readability Index (ARI), Linear Write, SMOG, and Gunning Fog
+Score the _readability_ of text using popular readability metrics including: [Flesch Kincaid Grade Level](#flesch-kincaid-grade-level), [Flesch Reading Ease](#flesch-reading-ease), [Gunning Fog Index](#gunning-fog), [Dale Chall Readability](#dale-chall-readability), [Automated Readability Index (ARI)](#automated-readability-index-ari), [Coleman Liau Index](#coleman-liau-index), [Linear Write](#linear-write), and [SMOG](#smog)
 
 <p align="center">
  <img src="https://raw.githubusercontent.com/cdimascio/py-readability-metrics/master/assets/py-readability-metrics.png" width="500"></>