Signed-off-by: Oleg Plakhotniuk <olegus8@gmail.com> closes #1412
This allows to parse PayPal balances which includes both symbol and letters, for instance "$ 42,00 USD". Also, it does not require adding any new symbols to the regular expression. It might break modules, though numerous cases were tested.
Those are non-module tests, and can be run by nosetests without a wrapper script.