[!] Changed claiming command to /reward claim <rewardType>

[+] Support for ItemsAdder's custom items, plugin now supports ItemAdders custom items, simply put the item's name from ItemAdders items list
[+] Support for textured heads (base64) in rewards menu, put the texture value instead of item type
Example:
[+] Added tab completion for commands
[!] Changed handling system with (sub)commands
[!] Fixed bug with announcing of available rewards after first join with disabled available rewards after first join