MongoDB:
Mongodb support has been added for storing playerdata and milestones
Messages in milestones:
Added command's to send messages to players when they receive a milestone.
/milestone addMessage <milestone> <message>
/repeatingmilestone addMessage <milestone> <message>
Bugfixes:
- fix issue with milestone's and 0 playtime
- Refresh translations on reload
- Fix issue with yaml storage and placeholder api