Add an additional separator for backups of invalid confgs
Reworked item based Abilities

+ ArmourAbility is now EquipmentAbility
+ItemAbility has been merged with EquipmentAbility
+ EquipementAbility and DropsAbility now use the Craftbukkit formatting
for items.
+ ArmourSet config node renamed to EquipmentSet
+ Drops config node renamed to DropSet
Increment version to 2.8