Readme tweaks

Author: PadraigK

README.md

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+**SwiftFormat** integrates Nick Lockwood's [SwiftFormat](https://github.com/nicklockwood/SwiftFormat) with [Nova](https://panic.com/nova).
+
+This extension will run the formatter when a Swift document is saved. It can also be invoked as an editor command. 
+
+![](https://raw.githubusercontent.com/PadraigK/swiftformat-nova/main/Images/screenshot.png)
+
+## Installation
+
+If you have Nova installed on your Mac, you can [install the extension](nova://extension/?id=org.padraig.SwiftFormat&name=SwiftFormat) from the extension library, or using the [Install](https://extensions.panic.com/extensions/org.padraig/org.padraig.SwiftFormat/) link on Panic's website.
+
+The SwiftFormat extension includes a built-in version of the actual formatter tool, so no additional setup is required. 
+
+If you would like to use a different version, you can set a path to a custom binary in settings. You might do this if you work on a team and want to ensure that everyone is using a particular version.
+
+## Usage
+SwiftFormat runs any time a Swift document is saved in Nova, automatically reformatting code according to the default SwiftFormat [rules](https://github.com/nicklockwood/SwiftFormat#rules). You can customize the rules by creating a `.swiftformat` [config file](https://github.com/nicklockwood/SwiftFormat#config-file) in the root of your project. 
+
+To run SwiftFormat manually:
+
+- Select the **Editor → SwiftFormat** menu item; or
+- Open the command palette and type `SwiftFormat`
+
+### Configuration
+To configure global settings, open **Extensions → Extension Library...** then select SwiftFormat's **Settings** tab.
+
+You can also configure settings on a per-project basis in **Project → Project Settings...**
+
+## Contributing and Collaboration
+
+I'd love to hear from you! Get in touch via [mastodon](https://mastodon.social/@PadraigOCinneide), an issue, or a pull request.
+
+By participating in this project you agree to abide by the [Contributor Code of Conduct](CODE_OF_CONDUCT.md).