Add SMS action

[realitix]

Hello,
Sadly I can't develop on android but can you add the send sms action like I did here: Jasonette/JASONETTE-Android#240

Then we could add it to the doc.
This action allows to send a SMS and can be very useful.

[clsource]

I believe this can be achieved by using href

{
  "href" : {
    "url" : "sms://phone-number",
   "view": "app"
   }
}

But some tests must be made in order to try that.
Thanks for your contribution could be added as an external optional component.