SuperVanish

Added a --all case for the argument of the vanish-show command that shows all vanished players

Splitted the code and created a Vanish Manager Class

• The vanish-show command makes vanished players visible again as usual, but you now have to specify the player you want to make visible
• The new vanish-list command generates a list of vanished players

I changed the vanish-show command, now it just displays the names of vanished players and not makes them visible.

Splitted the code into classes

Commands:

• /vanish
• /vanish-show
• /supervanish

Permissions:

vanish.use
vanish.show
vanish.supervanish