Changes:
- Cooldowns only checked on valid offering/ritual. This ensures you don't have to wait for a cooldown if you tried to start a ritual with an invalid item.
- Fixed missing shrine.cooldown message. Will now generate in lang.yml files
- Entering /deity with no args now displays your deity's info.
- Warning if more than one ritual has the same key item - rituals are intended to have a unique item to start.