Created mime type method so that the return value can be set in test easier
Created mime type method so that the return value
can be set in test easier

amstegraf/cakephp-upload,Phillaf/cakephp-upload,silviolleite/cakephp-upload,zynesis/cakephp-upload,josegonzalez/cakephp-upload,ramiroaraujo/cakephp-upload