update on !adjustrate command and add !relist command

#41

• update !adjustrate command to also refresh Autokeys settings/price (scrap adjustment included) (12071d2)
• add !relist command - you need to wait for the first 30 minutes after your bot is up and you'll be able to run this command when you think there's some missing listings on backpack.tf. After you've executed this command, then you'll need to wait another 30 minutes before you can run it again (eff4c58)