Fixes #81, setRate method calls itself.
Fixes #81, setRate method calls itself.

mhmmd-nauman/custom-quickbooks-app,pnomolos/quickbooks-php,scragz/quickbooks-php,consolibyte/quickbooks-php,csga5000/quickbooks-php,mryanb/quickbooks-php,ServiceTo/QuickBooks,jbaldock/quickbooks-php