First draft

There is enough to get you started.  It will require a SMSProxy.cfg to be created in the home folder of the user running the script (and that will require a Twilio account (I already had one for my own projects so it was easier for me to test)).  the Readme has the example curl command.  There is no attempt to sanitize the response into a standard success value or to trap any reported errors.  That will come next, but this works, so I figured I'd send it to you early.