Add part10 with passing tests

part10/tests/HtmlRunner.elm

@@ -0,0 +1,16 @@
+module HtmlRunner exposing (..)
+
+import Tests
+import Test.Runner.Html as Runner
+
+
+-- To run this:
+--
+-- cd into part8/test
+-- elm-reactor
+-- navigate to HtmlRunner.elm
+
+
+main : Program Never
+main =
+    Runner.run Tests.all