Added initial port of original OSX project.

- This is a copy of the [OSX](https://github.com/bkuhlmann/osx) project
  originally released on 2012-03-31. The OSX project has been
  deprecated. All future development and support will take place with
  this project instead.
- This project uses the *macOS* name in order to better match the
  updated branding and terminology used by Apple.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,11 @@
+## Overview
+<!-- Required. Why is this important/necessary? -->
+
+## Details
+<!-- Optional. List the key features/highlights as bullet points. -->
+
+## Notes
+<!-- Optional. List additional notes/references as bullet points. Delete if unused. -->
+
+## Screenshots/Screencasts
+<!-- Optional. Provide image/video support. Delete if unused. -->