added .xml files in the data folder to the gitignore
added .xml files in the data folder to the gitignore

Derek03/CodeIgniter3.1-starter3,Lab5comp4711/CodeIgniter3.1-starter3,Derek03/CodeIgniter3.1-starter3,Lab5comp4711/CodeIgniter3.1-starter3,Derek03/CodeIgniter3.1-starter3,Lab5comp4711/CodeIgniter3.1-starter3