Removed waffle.io project

Now using GitHub projects instead of external services

README.md

@@ -5,7 +5,6 @@
 [![Go Report Card](https://goreportcard.com/badge/github.com/maxibanki/golang-url-shortener)](https://goreportcard.com/report/github.com/maxibanki/golang-url-shortener)
 [![Coverage Status](https://coveralls.io/repos/github/maxibanki/golang-url-shortener/badge.svg?branch=master)](https://coveralls.io/github/maxibanki/golang-url-shortener?branch=master)
 [![License](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)
-[![Waffle.io - Columns and their card count](https://badge.waffle.io/maxibanki/golang-url-shortener.png?columns=all)](https://waffle.io/maxibanki/golang-url-shortener?utm_source=badge)
 [![Download](https://api.bintray.com/packages/maxibanki/golang-url-shortener/travis-ci/images/download.svg?version=0.1) ](https://bintray.com/maxibanki/golang-url-shortener/travis-ci/0.1/link)
 
 ## Main Features