Updated Doxyfiles: Added separate qthelp Doxyfiles that don't contain any custom stylesheet and that don't crate the html index. Removed qthelp settings from regular Doxyfiles.

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@5778 383ad7c9-94d9-4d36-a494-682f7c89f535