Add auto-increment for mana-like currencies
Add settings to increase the amount of a currency every tick:
incrementAmount and incrementTicks
incrementAmount can be a percentage of player's max balance

Added 2 new migrators (other than the legacy OfflinePlayer migrator):
- Essentials migrator
- XConomy migrator

Also reduced shutdown time

added baltopCommandAccounts config field to choose
how many accounts are shown on /baltop

Fixed clickable messages inside the browser (refresh lang file)