Allow translate the name of the currency on Currencies.php/CustomerReceipt.php and Payments.php
3/11/2013 Exson fixed the bug that discount id for category cannot be set and add an error message when there is no stockid set for the respective category.
03/11/2013 rchacon: Allow translate the name of the currency on CompanyPreferences.php.
04/11/2013 icedlava: change insert new clone stock event to transaction as in Stocks.php for new item.