zSpawner

• Improvement and correction of the spawner option system
• Added placeholders to display the options in a spawner item
• Added an information button to display the options of a spawner
• Use Sarah for database management (you can now use MYSQL)
• Fixed slime spawn

Add zEssentials mailbox on give commands (allows you to receive items in your mailbox if you are full)

• Added Shop button, allows to sell the content of the virtual spawner (only work with zshop for the moment)
• Fix error with default spawner option
• Added blacklist materials for virtual spawner
• Player with the permission "zspawner.bypass" can now open virtual spawner

Some fixs

• Update auto kill, if the player is online then the mob will be killed by the owner of the spawner