Merge pull request #985 from metabase/update_readme

fixes #577

resources/frontend_client/app/setup/partials/setup_help.html

 <div class="SetupHelp bordered border-dashed p2 rounded">
-  If you feel stuck, <a class="link" href="metabase.com/docs/">metabase.com/docs/</a> is just a click away.
+  If you feel stuck, <a class="link" href="http://www.metabase.com/docs/latest/getting-started">our getting started guide</a> is just a click away.
 </div>