Shift all the parts up a number.

part8/README.md

@@ -1,4 +1,4 @@
-Part 8
+Part 7
 ======
 
 ## Installation
@@ -15,3 +15,11 @@ to fail; in that case, just run `elm package install` again.)
 ```bash
 elm live Main.elm --open -- --output=elm.js
 ```
+
+## Running Tests
+
+```bash
+cd test
+elm package install
+elm test TestRunner.elm
+```