Integrate some simple mnemon quizzing into scherzo.

[scherzo] / mnemon

diff --git a/mnemon b/mnemon
index 10d0f1e757ef8c22bf8c1d921b624296a25ab238..12dfc3592e237017c9a9afd8708728f58f8ab68a 160000 (submodule)
--- a/mnemon
+++ b/mnemon
@@ -1 +1 @@
-Subproject commit 10d0f1e757ef8c22bf8c1d921b624296a25ab238
+Subproject commit 12dfc3592e237017c9a9afd8708728f58f8ab68a