📝 Add resources.

Author: damienfraud

README.md

@@ -185,3 +185,7 @@ Type of change labels are only used for pull requests. They give information abo
 ## CONTRIBUTING.md
 
 ## Resources
+
+- The Official raywenderlich.com Swift Style Guide.[GitHub](https://github.com/raywenderlich/swift-style-guide/blob/master/README.markdown)
+- Sane GitHub Labels. [Medium](https://medium.com/@dave_lunny/sane-github-labels-c5d2e6004b63)
+- GitHub Labels and Milestones. [Saltstack](https://docs.saltstack.com/en/2017.7/topics/development/labels.html)