Permissions for v0.9+

• achievements.check - only players that have that permissions will be checked + awarded
• achievements.view.own - grants access to /achievements (/ach)
• achievements.view.list - grants access to /listachievements (/listach)
• achievements.admin.check - grants access to /checkachievements (/chekcach)
• achievements.admin.reload - grants access to /reloadachievements (/reloadach)