Add codefactor

Author: dbwiddis

README.md

@@ -14,7 +14,8 @@
 [![SonarQube Reliability](https://sonarcloud.io/api/project_badges/measure?project=com.github.oshi%3Aoshi-parent&metric=reliability_rating)](https://sonarcloud.io/dashboard?id=com.github.oshi%3Aoshi-parent)
 [![SonarQube Security](https://sonarcloud.io/api/project_badges/measure?project=com.github.oshi%3Aoshi-parent&metric=security_rating)](https://sonarcloud.io/dashboard?id=com.github.oshi%3Aoshi-parent)
 [![Code Quality: Java](https://img.shields.io/lgtm/grade/java/g/oshi/oshi.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/oshi/oshi/context:java)
-[![LGTM Stats](https://www.openhub.net/p/oshi/widgets/project_thin_badge.gif)](https://www.openhub.net/p/oshi?ref=github)
+[![CodeFactor](https://www.codefactor.io/repository/github/oshi/oshi/badge)](https://www.codefactor.io/repository/github/oshi/oshi)
+[![Openhub Stats](https://www.openhub.net/p/oshi/widgets/project_thin_badge.gif)](https://www.openhub.net/p/oshi?ref=github)
 [![first-timers-only](https://img.shields.io/badge/first--timers--only-friendly-blue.svg?style=flat-square)](https://www.firsttimersonly.com/)
 [![Join the chat at https://gitter.im/oshi/oshi](https://badges.gitter.im/oshi/oshi.svg)](https://gitter.im/oshi/oshi?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 

UPGRADING.md

@@ -3,9 +3,8 @@
 
 OSHI 4.0 requires minimum Java 8 compatibility.
 
-The `oshi-json` artifact has been completely removed. It is trivial to obtain
-JSON output using [Jackson's ObjectMapper](http://www.mkyong.com/java/
-jackson-2-convert-java-object-to-from-json/).
+The `oshi-json` artifact has been completely removed. It is trivial to obtain JSON output using the
+[Jackson ObjectMapper](http://www.mkyong.com/java/jackson-2-convert-java-object-to-from-json/).
 
 There is a new `oshi-demo` artifact which will contain many "how to" classes
 to demonstrate OSHI's capabilities and integration with other libraries.