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/react/stores/browser_store.jsx

@@ -8,7 +8,7 @@ function getPrefix() {
 }
 
 // Also change model/utils.go ETAG_ROOT_VERSION
-var BROWSER_STORE_VERSION = '.3';
+var BROWSER_STORE_VERSION = '.4';
 
 module.exports = {
     _initialized: false,