Add SMS support

Summary:
Provides a working SMS implementation with support for Twilio.

This version doesn't really retry if we get any gruff at all. Future versions should retry.

Test Plan: used bin/sms to send messages and look at them.

Reviewers: chad, epriestley

Reviewed By: epriestley

Subscribers: aurelijus, epriestley, Korvin

Maniphest Tasks: T920

Differential Revision: https://secure.phabricator.com/D8930

externals/twilio-php/tests/RequestValidatorTest.php

@@ -0,0 +1,48 @@
+<?php
+
+require_once 'Twilio/RequestValidator.php';
+
+class RequestValidatorTest extends PHPUnit_Framework_TestCase {
+    
+    function testRequestValidation() {
+        $token = "1c892n40nd03kdnc0112slzkl3091j20";
+        $validator = new Services_Twilio_RequestValidator($token);
+
+        $uri = "http://www.postbin.org/1ed898x";
+        $params = array(
+            "CalledZip" => "94612",
+            "AccountSid" => "AC9a9f9392lad99kla0sklakjs90j092j3",
+            "ApiVersion" => "2010-04-01",
+            "CallSid" => "CAd800bb12c0426a7ea4230e492fef2a4f",
+            "CallStatus" => "ringing",
+            "Called" => "+15306384866",
+            "CalledCity" => "OAKLAND",
+            "CalledCountry" => "US",
+            "CalledState" => "CA",
+            "Caller" => "+15306666666",
+            "CallerCity" => "SOUTH LAKE TAHOE",
+            "CallerCountry" => "US",
+            "CallerName" => "CA Wireless Call",
+            "CallerState" => "CA",
+            "CallerZip" => "89449",
+            "Direction" => "inbound",
+            "From" => "+15306666666",
+            "FromCity" => "SOUTH LAKE TAHOE",
+            "FromCountry" => "US",
+            "FromState" => "CA",
+            "FromZip" => "89449",
+            "To" => "+15306384866",
+            "ToCity" => "OAKLAND",
+            "ToCountry" => "US",
+            "ToState" => "CA",
+            "ToZip" => "94612",
+            );
+
+        $expected = "fF+xx6dTinOaCdZ0aIeNkHr/ZAA=";
+
+        $this->assertEquals(
+            $validator->computeSignature($uri, $params), $expected);
+        $this->assertTrue($validator->validate($expected, $uri, $params));
+    }
+
+}