Additional Storage options

What's Changed

• Move commands to CommandAPI by @T14D3 in #10
  • Improves UI/UX, but mainly just means the code is no longer a complete mess
• More storage options by @T14D3 in #11
  • Adds (experimental) Database support for storing regions in one of the following options (previously just YAML):
    • YAML
    • MySQL
    • SQLite
    • PostgreSQL
    • H2
    • Other, requires custom connection string
  • Includes command for migrating between different types
• Config auto-updating
  • Automatically adds missing config options to your config!
• Improved plugin startup speed
  • Reduces server/plugin startup time by ~5 seconds (depending on exact hardware)

Full Changelog: 0.2.0...0.2.1