Clean up travis config

.travis.yml

@@ -5,7 +5,7 @@ php:
   - 5.4
 
 before_script:
-  - sh -c "wget -nc http://getcomposer.org/composer.phar"
-  - sh -c "php composer.phar update"
+  - wget -nc http://getcomposer.org/composer.phar
+  - php composer.phar update
 
 script: phpunit