Rename INSTALLHOWTO.txt to README.md

sms/INSTALLHOWTO.txt → sms/README.md

@@ -21,4 +21,4 @@ https://YOURDOMAIN/app/sms/hook/sms_hook_twilio.php
 You will need to have a valid certificate to use twilio. If you need a certificate, consider using Let’s Encrypt and certbot. It’s fast and free. 
 
 
-Send and receive.
+Send and receive.