Simple Vanish

• implements a fix for an issue where mobs would still target you after you enabled vanish.
• Adjusted the default vanish settings to be more of what people would expect - default settings are now

vanishPersist: enabled, 
nightVision: enabled, 
breakBlocks: disabled, 
containerOpen: disabled, 
attackEntities: disabled, 
mobsTarget: disabled, 
pickupItems: disabled, 
invulnerability: enabled, 
leaveSilently: enabled, 
joinSilently: enabled, 
vanishNotifications: enabled