1.1.0

• Removed AbstractNumber::create() in favor of extensibility. Added to the default Number class.
  (it was not possible to extend the method by adding arguments in AbstractNumber implementations).
  Add this method to your own AbstractNumber implementations if you like to be able to use this static factory method.
• Changed access identifier of AbstractNumber::getNumberFromInput() from private to protected in favor of extensibility.

1.0.0

• Initial release