Add hackage/license link/badge

Author: bsima

README.md

@@ -1,5 +1,9 @@
 # Haskell Urbit API
 
+[![License MIT](https://img.shields.io/badge/license-MIT-brightgreen.svg)](https://opensource.org/licenses/MIT)
+[![Hackage](https://img.shields.io/hackage/v/req.svg?style=flat)](https://hackage.haskell.org/package/urbit-airlock)
+
+
 This library helps you talk to your Urbit from Haskell, via HTTP.
 
 The "Urbit Airlock" API is a command-query API that lets you hook into apps
@@ -17,7 +21,9 @@ responses, we stream messages from a path associated with the app, such as
 `/mailbox/~/~zod/mc`. Internally, I believe Urbit calls these `wire`s.
 
 `urbit-airlock` handles most of the path, session, and HTTP request stuff
-automatically. See the haddocks for more details.
+automatically. See the
+[haddocks](https://hackage.haskell.org/package/urbit-airlock/docs/Urbit-Airlock.html)
+for more details.
 
 This library is built on req, conduit, and aeson, all of which are very stable
 and usable libraries for working with HTTP requests and web data.