* Sets the played time using Bukkit metadata
* Replaced "disallow-further" and "disallow-this-level" in favour of
"timedpex.norank" permission node. These can now be removed from your
config.yml
* Backend code cleanup 
* Renamed a couple of classes to more useful names
+ Added GroupConfiguration
+ Fix for players automatically being ranked to nothing
+ Fix for the /reload bug
+ Added the /timeleft command on request, with permission
"timedpex.timeleft" defaulting to everybody. 
- Removed /timedpex reload, isn't really required in a small plugin.