Just as a warning to those that have made a backup with r515 and are going to update their HG install. I found that when updating to r519 my settings got messed up. I used my r515 backup to restore and most everything came back but the module names were gone. I checked the backup file (modules.xml) and found that all of the "name" fields were missing a value. If you are going to update and do not have an older backup, consider copying your installation directory for a backup so you don't have to recreate your module names! In my case I had an older backup (r514) and was able to get back up and running immediately. I did not check my r519 backup yet, but am assuming it has the "name" field populated correctly.
