Adding logo to README.md

Author: vickumar1981

README.md

@@ -1,4 +1,6 @@
-# StringDistance
+![Logo](logo.png)
+
+# StringDistance  
 
 [![Build Status](https://api.travis-ci.org/vickumar1981/stringdistance.svg?branch=master)](https://travis-ci.org/vickumar1981/stringdistance/builds) [![Coverage Status](https://coveralls.io/repos/github/vickumar1981/stringdistance/badge.svg?branch=master)](https://coveralls.io/github/vickumar1981/stringdistance?branch=master) [![Read the Docs](https://img.shields.io/readthedocs/pip.svg)](https://vickumar1981.github.io/stringdistance/api/com/github/vickumar1981/stringdistance/index.html) [![Maven metadata URI](https://img.shields.io/maven-metadata/v/http/central.maven.org/maven2/com/github/vickumar1981/stringdistance_2.12/maven-metadata.xml.svg)](https://mvnrepository.com/artifact/com.github.vickumar1981/stringdistance) [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)