Updated Travic Config:

tjlytle · tjlytle · commit 1d20a4a0e37a · 2016-05-20T10:12:00.000-04:00
- Added build badge
- Added more versions.
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,9 @@
 language: php
 php:
+  - '5.4'
+  - '5.5'
   - '5.6'
+  - '7.0'
 
 before_script:
   - composer install
diff --git a/README.md b/README.md
@@ -1,5 +1,6 @@
 Nexmo Client Library for PHP 
 ============================
+[![Build Status](https://api.travis-ci.org/Nexmo/nexmo-php.svg?branch=master)](https://travis-ci.org/Nexmo/nexmo-php)
 
 [Installation](#Installation) | [Usage](#Usage) |  [Examples](#Examples) | [Coverage](#API-Coverage) | [Contributing](#Contributing)  
 
