v2.0.0

• Add permanent custom symbol
• Add stafflist, hide, seen, and richestusers command
• Add and remove some emoticons
• Add customavatars
• Refactor shop and create new module called UserMod for custom
  symbols, hiding, and seen
• Fix emoticons parsing when using commands
• Fix regdate
• Fix message transfermoney sending to the wrong user
• Remove uncessary stuff
• Seperate users Mongo collections into users and usergroups
  • usernames are now userids in the users collections
• dev-deps: eslint@^0.19.0