Added README

README.md

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+# Sortify
+#### Xcode Source Editor Extension for Sorting Lines
+
+<div align="center">
+  <img src=".github/AppIcon.png">
+</div>
+
+This was built as a prototype to test Xcode Extensions.
+
+## Installation
+
+### Build
+
+Using `Xcode 9+`
+1. Download the source code.
+2. Open the Sortify.xcodeproj and run the _SortifyExtension_ target, choosing Xcode as the host application.
+
+This is a **temporary installation** as it will only work when running the project.
+
+### Zip
+
+1. Download the [latest release](https://github.com/FranciscoAmado/Sortify/releases) `Sortify.zip`
+2. Open the `Sortify.app`, which will add the Extension to Xcode.
+3. (Optional) Move the `Sortify.app` to the `Applications` folder.
+
+You can validate if the Extension is enabled in `System Preferences >> Extensions`
+
+## Usage
+
+1. Select the lines that will be sorted in the open file
+2. Xcode >> Editor >> Sortify >> **Sort Selected Lines**
+
+![Sortify in Xcode](./.github/sortify.gif)
+
+## Known issues
+
+* Simple text sorting
+* Text needs to be aligned to work properly
+
+## TODO
+
+- [ ] Maybe add `import` sorting
+
+## Acknowledgments
+
+App Icon Arrow made by <a href="https://www.flaticon.com/authors/dave-gandy" title="Dave Gandy">Dave Gandy</a> is licensed by <a href="http://creativecommons.org/licenses/by/3.0/" title="Creative Commons BY 3.0" target="_blank">CC 3.0 BY</a>
+
+All the rest is free.
+
+## Contributing
+
+Open an [issue](https://github.com/FranciscoAmado/Sortify/issues/new) or a [Pull Request](https://github.com/FranciscoAmado/Sortify/compare). All help is appreciated.