Revise tests

Link to fuzz test docs and Fuzzer docs

Move part9 to be part12

Update part11

Update 12, and some other Mains

Rearrange things, drop 2 modules

Add a new part12

Fix READMEs

Move some things up a directory

Update part11

Use ! []

Update parts7-9

Fix part12g

Swap part11 and part12

Fix readmes for part11 and part12

Add HtmlRunner to part8

Update part8 and part9 READMEs

rm part10/test

part12/README.md

@@ -19,6 +19,12 @@ to fail; in that case, just run `elm-package install` again.)
 elm-live Main.elm --open --output=elm.js
 ```
 
+## Compiling CSS
+
+```bash
+elm css Stylesheets.elm
+```
+
 ## References
 
-* [Elm Architecture Tutorial](https://github.com/evancz/elm-architecture-tutorial)
+* [Elm CSS documentation](http://package.elm-lang.org/packages/rtfeldman/elm-css/1.1.0/)