Bugfixes:
- The friend-item will not appear multiple times anymore
- This includes changing the slot
- and multipling after death or by pickup up a dropped head
- When making a mistake editing the config.yml, you will now be told where your error comes from
- Removed errors in the console for unsupported material names
- Removed errors with unsupported inventory names

New features:
- You can now toggle party-invites by command using /friends party
- You can now toggle in the config.yml wether you want friends to pvp -> Friends.FriendsCanPvP
- You can now toggle in the party.yml wether you want player in a party to pvp -> Party.PartyMembersCanPvP
- You can now hit someone with the Friendsitem to send him a request ( Can be disabled in the config.yml -> Friends.HitToSendRequest )