README: note about workflow

Author: paulshapiro

README.md

@@ -54,4 +54,6 @@ Suggestions and feedback are very welcome!
 
 We'll merge nearly anything constructive. Contributors welcome and credited in releases.
 
-We often collaborate over IRC in #mymonero on Freenode.
+We often collaborate over IRC in #mymonero on Freenode.
+
+**All development happens off the `develop` branch like the Gitflow Workflow.**