Added central functions library and added a currency_format function there.

tbrehm

2011-02-08 dfaec1cdbb42fbe92bf1faca0d1bbdeb76d6079a

 interface/lib/classes/listform.inc.php

@@ -329,7 +329,7 @@
                        break;

                    case 'CURRENCY':
                        $record[$key] = number_format($record[$key], (int)$app->lng('number_format_decimals'), $app->lng('number_format_dec_point'), $app->lng('number_format_thousands_sep'));
                        $record[$key] = $app->functions->currency_format($record[$key]);
                        break;

                    default: