Cleanup README.md

Author: tarleb

README.md

@@ -1,11 +1,24 @@
 # hslua-module-doclayout
 
-[![GitHub CI](https://github.com/hslua/hslua-module-doclayout/workflows/CI/badge.svg)](https://github.com/hslua/hslua-module-doclayout/actions)
-[![Build status](https://img.shields.io/travis/hslua/hslua-module-doclayout.svg?logo=travis)](https://travis-ci.org/hslua/hslua-module-doclayout)
+[![GitHub CI][CI badge]](https://github.com/hslua/hslua-module-doclayout/actions)
+[![Build status][Travis badge]](https://travis-ci.org/hslua/hslua-module-doclayout)
 [![Windows build status](https://ci.appveyor.com/api/projects/status/github/hslua/hslua-module-doclayout?branch=master&svg=true)](https://ci.appveyor.com/project/hslua/hslua-module-doclayout)
-[![Hackage](https://img.shields.io/hackage/v/hslua-module-doclayout.svg?logo=haskell)](https://hackage.haskell.org/package/hslua-module-doclayout)
-[![Stackage Lts](http://stackage.org/package/hslua-module-doclayout/badge/lts)](http://stackage.org/lts/package/hslua-module-doclayout)
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-[![MIT license](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
+[![Hackage][Hackage badge]](https://hackage.haskell.org/package/hslua-module-doclayout)
+[![Stackage Lts][Stackage Lts badge]](http://stackage.org/lts/package/hslua-module-doclayout)
+[![Stackage Nightly][Stackage Nightly badge]](http://stackage.org/nightly/package/hslua-module-doclayout)
+[![MIT license][License badge]](LICENSE)
 
-Lua module wrapping Text.DocLayout.
+Lua module wrapping the [doclayout] Haskell package.
+
+[doclayout]: https://hackage.haskell.org/package/doclayout
+[CI badge]: https://github.com/hslua/hslua-module-doclayout/workflows/CI/badge.svg
+[Travis badge]: https://img.shields.io/travis/hslua/hslua-module-doclayout.svg?logo=travis
+[Hackage badge]: https://img.shields.io/hackage/v/hslua-module-doclayout.svg?logo=haskell
+[Stackage Lts badge]: http://stackage.org/package/hslua-module-doclayout/badge/lts
+[Stackage Nightly badge]: http://stackage.org/package/hslua-module-doclayout/badge/nightly
+[License badge]: https://img.shields.io/badge/license-MIT-blue.svg
+
+# License
+
+This package is made available under the MIT license. See [`LICENSE`](LICENSE)
+for details.