[PATCH 5/6] Add a cheetsheet link to the README.txt

[chrisj at rtems.org]

From: Chris Johns <chrisj at rtems.org>

---
 README.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/README.txt b/README.txt
index ed05fb8..e002f60 100644
--- a/README.txt
+++ b/README.txt
@@ -24,6 +24,10 @@ created is worth it.
 
 Images can be created from source using PlantUML and Ditaa.
 
+A Sphinx checksheet is:
+
+ http://docs.sphinxdocs.com/en/latest/cheatsheet.html#rst-cheat-sheet
+
 Production Quality Hosts
 ------------------------
 
-- 
2.19.1