Improved Importer, Updated Methods.reloadPlugin

Commands:
- Reworked importer so it no longer creates bendingPlayers, stores them, then loads them again to save into database
- Added new debug messages, and helpful messages
- Now reloads the plugin when importing is finished
- Increased import speed by heaps
- Now uses ImportTask as runnable

ImportTask:
- New class which implements Runnable for importing

Methods:
- Added boolean importing
- Added methods isImporting and setImporting
- Methods.reloadPlugin() now cancels all scheduled tasks and starts them up again

PKListener:
- Now kicks players when Methods.isImporting() is true