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

This reverts commit 49fefa53669594e72259162b6e1fed69c38720fb.
Revert "Revert "Update and rename Textmarketer.php to Smsit.class.php""

This reverts commit 65df6be4bd41609580bcc39099c82ffa0ffa80f9.
Revert "Revert "Revert "Update and rename Textmarketer.php to Smsit.class.php"""

This reverts commit 063bd4e43006e23497b9f923dccf1f8aece1eeb1.