CA/R Markdown demo: do not make it self-contained

too slow

Change-Id: I7c2558bd69605d28797eeebf76c52d0475afbb7f
diff --git a/.gitignore b/.gitignore
index 04ac529..305f4b5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,5 @@
 cache/
 docs
 *.log
+*_files/
+*.bak