Use CircleCi to build and test

Adds a circle.yml file that calls phpunit
and uses PHP 5.5.11 as the target version.

Author: dehora

circle.yml

@@ -0,0 +1,7 @@
+test:
+  override:
+    - phpunit
+
+machine:
+  php:
+    version: 5.5.11

tests/Intercom/IntercomBasicAuthClientTest.php

@@ -36,7 +36,7 @@ public function testAuthIsSet()
     function testGetServiceDescriptionFromFile()
     {
         $client = new IntercomBasicAuthClient($this->config);
-        $sd = $client->getServiceDescriptionFromFile(__DIR__ . '/../../src/intercom/Service/config/intercom_v3.json');
+        $sd = $client->getServiceDescriptionFromFile(__DIR__ . '/../../src/Intercom/Service/config/intercom_v3.json');
         $this->assertInstanceOf('Guzzle\Service\Description\ServiceDescription', $sd);
     }