Changed getFileType Method

Updated to check if the uploaded file is an image and if so, use
getimagesize() to returns it's MIME type.
only show MIME type of file
Commented out un-needed LI's

which allow me to concentrate on the output I am investigating
Changed getFileType method to use finfo
Removed comments so we can show output
Updated some methods

Updated with some sanity checks, as well has proposed better methods of
obtaining info about a file. This is nothing new here. Just better than
pulling from global array