Update readme

README.md

@@ -1,5 +1,12 @@
 # license-tool-hs
 
-Haskell remake of the [Rust version][1].
+This is a small tool to create LICENSE files for projects. Run the `license-tool
+-h` for a instructions on use.
 
-[1]: https://git.zander.im/Zander671/license-tool
+### Building
+
+This program is built with [Stack][1]. Use `stack build` to compile and `stack
+install` to install. You also need to copy `licenses/` to
+`/usr/share/license-tool/` or change the file path at the top of `src/Main.hs`.
+
+[1]: https://docs.haskellstack.org/en/stable/