Bug Fixes:
- Fixed a bug with clan allies when breaking an alliance.
- Fixed a bug with some broken allies data.
- Fixed a NPE with player leaving a clan.

Added:
- settings.create-with-items-and-money options in config.yml to allow players to create a clan using their money and also minecraft items.
- Placeholders in clan list menu: %level%, %exp%, %max-exp%, %balance%, %prefix%.

Improvement:
- This version has several performance improvements when handling data.
- Code cleaned in some managers.