Update notes about examples after recent changes.

Author: nsaunders

examples/README.md

@@ -3,5 +3,11 @@
 You can use the following command to run an example, replacing `<name>` with the
 appropriate value:
 ```bash
-spago -x example.dhall run -m Example.<name>
+spago -x example.dhall run -p examples/<name>.purs -m Example.<name>
 ```
+
+## CSS output
+The [`output`](./output) subdirectory contains the CSS output produced by each example.
+
+## Type errors
+The [`type-errors`](./type-errors) subdirectory contains examples of type safety that Tecton adds to CSS. All of these examples fail to compile (intentionally).