add the dev start guide to the index.

efd5ce19 · Frederic · 95aff0e4 · efd5ce19
--- a/doc/index.txt
+++ b/doc/index.txt
@@ -131,6 +131,7 @@ Community
   library/index
   optimizations
   extending/index
+   dev_start_guide
   glossary
   links
   internal/index