Changing the way we mattermost handles URLs. team.domain.com becomes domain.com/team.

Renaming team.Name to team.DisplayName and team.Domain to team.Name.
So: team.Name -> url safe name. team.DisplayName -> nice name for users

web/templates/home.html

@@ -17,7 +17,7 @@
     </div>
   </div>
   <script>
-  window.setup_home_page();
+	window.setup_home_page({{.Props.TeamURL}});
   </script>
 </body>
 </html>