Version 2.16.1

Fix bug when create expression to query for the SAT status and the RFC (emisor or receptor) contains the characters & or Ñ. The service requires that the expression is XML "encoded". Thanks, @ramboram and @TheSpectroMx for your help.

Refactor test script tests/estadosat.php.

Fix typos on "Complemento de Nómina versión 1.2, revisión B" documentation.