Add new features to the API

[instance01]

• [ ] Updates for each minigame
• [ ] Permission nodes for triple/double coins and for some subcommands like / reload
• [ ] Kits MySQL
• [ ] Multiple join signs
• [ ] Support stats holograms everywhere (and check if it works on the latest spigot versions?)
• [ ] Extra timer classes for countdowns
• [ ] Optional (pvp) grace period
• [ ] Killing sprees + shutdown (LoL-style)
• [ ] Add functions for more effects like particles for bows
• [ ] API for custom achievements and kits

[Darkool]

maybe Achivement mysql?