Merge pull request #1012 from silverstripe/pulls/2.4-travis

Update travis configuration to use composer phpunit

.travis.yml

@@ -12,7 +12,7 @@ before_script:
  - cd ~/builds/ss
 
 script: 
- - phpunit cms/tests
+ - vendor/bin/phpunit cms/tests
 
 branches:
   except:

composer.json

@@ -19,5 +19,8 @@
 		"php": ">=5.2.4",
 		"composer/installers": "*",
 		"silverstripe/framework": "2.4.*"
+	},
+	"require-dev": {
+		"phpunit/PHPUnit": "~3.7"
 	}
 }