Revert "Revert "Revert "Revert "Update and rename Textmarketer.php to Smsit.class.php""""

This reverts commit b8f25384b298fd40cf630b95095d2c600ab89ef8.
Revert "Revert "Revert "Revert "Revert "Update and rename Textmarketer.php to Smsit.class.php"""""

This reverts commit cc7a7f29f52556b3891286a0b81fb0a943f652e7.