Update to 0.5.1
- fixed NPE when non-entities shoot arrows (e.g. dispensers)
- changedGrapplingHook cooldown to only apply, if you actually hook
yourself
- added canPickupArrow config value, to allow/deny the pickup of
GrapplingHook arrows
- added stealFailedMsg and cantStealMsg to pickpocket config
- added /wayofshadows command, which reloads all skills
- added shadow.<pickpocket>.exempt permission
- added defaultValue parameter for values.yml (-1 when non existant)
- added items with a value smaller than 0, are not stealable. 
If you want items to be not stealable, assign them a high negative value
- added attackerMsg and victimMsg config values to AirAssassination
skills
- added ShadowPickPocketFailEvent and ShadowPickPocketEndEvent