Error handler to other type of Exceptions on the get methods

[devaguia]

The 'get' method, present on the Address, Price, Date and Tracking files, should not generate a fatal error. Instead, she should handler and treat the error using the $errors property.

The get method shoul be able to treat the following Exceptions:

• InvalidCepException
• InvalidCorreiosServiceCode
• MissingProductParamException
• SameCepException