Update README.md

BishopGIS · BishopGIS · commit b312661a4bc0 · 2015-05-19T15:16:18.000+03:00
diff --git a/README.md b/README.md
@@ -6,5 +6,6 @@ git clone --recursive git@github.com:nextgis/docs_ng.git
 make html
 make latexpdf
 ```
+to generate key for ssh git access see: https://help.github.com/articles/generating-ssh-keys/
 
 See wiki for future details
