Address validation fix

Moved: $address = new Address(isset($_POST['id_address']) ? (int)$_POST['id_address'] : null);

Moved out of IF statement.
Update and rename Message.class.php to AvalaraMessage.class.php
Update AddressServiceSoap.class.php
Update avalaratax.php
AvalaraTax : Updated version in config.xml
Merge branch 'prestachris-master'