Changelog:

- bugfix: numbers over 1b were showed as 1e9 instead of 1,000,000,000
- the ah now stays open when buying an item
- added a slightly different message as auction announcement to distinguish between BIN and BID auctions.
- fixed a small bug when updating from an old version of the plugin: it would always put the currency symbol before the number instead of copying the old setting of the config over to the messages.yml file