don't use deprecated method to get file type from extension, as it doesn't work with UTIs
don't use deprecated method to get file type from extension, as it doesn't work with UTIs

git-svn-id: cb3fc60f0f557b927b8032d8a94e869b6f9f230b@5370 0fceea05-a30d-0410-8a8b-80ef821fb0a1

camillobruni/skim,camillobruni/skim,camillobruni/skim,jasongrout/skim,jasongrout/skim,camillobruni/skim