Fixed an error which occurred if the config didn't have a title for it's size.
Added a 'DefaultTitle' value to the backpacks config.
Better configuration handling.
If a player had items scattered all over their backpack, and were then downgraded 1 size, then as long as the items from the last row would fit into the rest of the backpack, it would add them.
Fixed a possible duplication glitch.
Added the permission 'backpack.keepOnDeath' so even if, in config, it was set so that players would drop their backpack on death, this would make it so whichever player had it, this would not occur to them.
