Fix README issues.

- Fix Docker Image size badge.
- Add Southwest logo instead of broken hot-linked image.
- Remove contributors links and use markdown list.

README.md

@@ -4,16 +4,24 @@
 [![Maintainability](https://api.codeclimate.com/v1/badges/aa1c955dfcba58a7352f/maintainability)](https://codeclimate.com/github/pyro2927/SouthwestCheckin/maintainability)
 [![Test Coverage](https://api.codeclimate.com/v1/badges/aa1c955dfcba58a7352f/test_coverage)](https://codeclimate.com/github/pyro2927/SouthwestCheckin/test_coverage)
 [![Docker Build Status](https://img.shields.io/docker/automated/pyro2927/southwestcheckin.svg?style=flat)](https://hub.docker.com/r/pyro2927/southwestcheckin)
-[![Docker Image Size](https://images.microbadger.com/badges/image/pyro2927/southwestcheckin.svg)](https://microbadger.com/images/pyro2927/southwestcheckin)
+[![Docker Image Size](https://img.shields.io/docker/image-size/pyro2927/southwestcheckin)](https://hub.docker.com/r/pyro2927/southwestcheckin)
 
-![](http://www.southwest-heart.com/img/heart/heart_1.jpg)
+![](img/southwest-heart.svg)
 
 This python script checks your flight reservation with Southwest and then checks you in at exactly 24 hours before your flight.  Queue up the script and it will `sleep` until the earliest possible check-in time.
 
 ## Contributors
-
-[![](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/images/0)](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/links/0)[![](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/images/1)](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/links/1)[![](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/images/2)](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/links/2)[![](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/images/3)](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/links/3)[![](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/images/4)](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/links/4)[![](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/images/5)](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/links/5)[![](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/images/6)](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/links/6)[![](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/images/7)](https://sourcerer.io/fame/pyro2927/pyro2927/SouthwestCheckin/links/7)
-
+- pyro2927
+- ratabora
+- bllfr0g
+- the001
+- rgkimball
+- nickethier
+- tashey33
+- unusedaccount
+- janina213
+- Raikia
+- lawrencefoley
 
 ## Requirements