Merge pull request #11 from liquidweb/fix/travis-composer-install

Update travis file to run composer install to generate autoloader.

Author: bswatson

.travis.yml

@@ -50,6 +50,7 @@ before_script:
       composer global require wp-coding-standards/wpcs
       phpcs --config-set installed_paths $HOME/.composer/vendor/wp-coding-standards/wpcs
     fi
+  - composer install --prefer-source
 
 script:
   - |