Update README with doc links (#40)

This patch adds MIT license and updates README with useful links.

Author: ybubnov

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2022 Yasha Bubnov
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,3 +1,23 @@
-# PlotUI
+# [PlotUI](https://ploui.pages.dev) · [![Tests][Tests]](https://github.com/ybubnov/PlotUI)
 
-A description of this package.
+Integrate beautiful minimalistic plots into your app.
+
+## Installation
+
+You can use PlotUI as package dependency to your app using
+[Xcode](https://developer.apple.com/documentation/swift_packages/adding_package_dependencies_to_your_app):
+
+```text
+github.com/ybubnov/PlotUI
+```
+
+## Documentation
+
+The [PlotUI Documentation](https://plotui.pages.dev) contains additional details on how
+to get started with PlotUI.
+
+## License
+
+PlotUI is [MIT licensed](LICENSE).
+
+[Tests]: https://github.com/ybubnov/PlotUI/workflows/Tests/badge.svg