Add project information to README

Author: weavejester

README.md

@@ -1,10 +1,33 @@
 # Duct REPL Refers [![Build Status](https://github.com/duct-framework/repl.refers/actions/workflows/test.yml/badge.svg)](https://github.com/duct-framework/repl.refers/actions/workflows/test.yml)
 
-A Clojure library designed to ... well, that part is up to you.
+[Integrant][] methods for adding functions to the `user` namespace.
+Used by [Duct][] modules to add useful development functions to the
+REPL.
+
+[integrant]: https://github.com/weavejester/integrant
+[duct]: https://github.com/duct-framework/duct
+
+## Installation
+
+Add the following dependency to your deps.edn file:
+
+    org.duct-framework/repl.refers {:mvn/version "0.1.0-SNAPSHOT"}
+
+Or to your Leiningen project file:
+
+    [org.duct-framework/repl.refers "0.1.0-SNAPSHOT"]
 
 ## Usage
 
-FIXME
+To use, add the `:duct.repl/refers` key to your configuration with a map
+of aliases to fully-qualified symbols. For example:
+
+```edn
+{:duct.repl/refers {trim clojure.string/trim}}
+```
+
+When the configuration is initiated, `trim` will be added to the `user`
+namespace. When the running system is halted, `trim` will be removed.
 
 ## License