A source editor extension for easy Swift version #if defs

1. Clone the repository, or Download the zip
2. Open WrapperXcode.xcodeproj
3. Select the WrapperXcode application, and Build and Run
4. The blank application will open, and you can then quit it:
5. Head to System Preferences -> Extensions, and you should see the WrapperExtension ready for you to select:
6. Select the text you want to update and then run the extension via the Editor menu
7. Optionally set a keyboard shortcut for the extension via Xcode's Key Bindings pane in Preferences: