php version update from 5.4 to 5.5 for travis
php version update from 5.4 to 5.5 for travis

gios-asu/wordpress-news-kiosk-plugin,gios-asu/wordpress-news-kiosk-plugin,gios-asu/wordpress-news-kiosk-plugin,gios-asu/wordpress-news-kiosk-plugin