Fix typos and source file encoding
Add 'goto home / storage' to the goto command help
Fix trade bug with non-stackable items
Change behaviour on disconnect, add some paranoia checks and optimize some sql-statements for mysql
Merge branch 'master' into new_version

Conflicts:
	AdvancedCommunication/DONATECommandHandler.cs
	AdvancedCommunication/GiveToCommandHandler.cs
	TradeHandler.cs