#################################################### Concurrent Editing Module ####################################################
Andreas Piening (Nickname: apiening) <andreas (at) silverstripe (dot) com>
SilverStripe 2.4.0 or newer
The module is automatically enabled after running dev/build
The module stores all users currently editing a page in the database when a page is opened. Other users which opened the same page in the CMS will be notified about the concurrent usage. Storing and retrieving this state is performed by periodical ajax "pings".