robustified instawiz.pl against people who don't have the MD5 module
robustified instawiz.pl against people who don't have the MD5 module

git-svn-id: e3d25b6f29e2f17f85f87cc942fdd5152d6fd551@7 e0b52255-4d19-46bf-85a1-0da9088114c4

UniStuttgart-VISUS/megamol,UniStuttgart-VISUS/megamol,UniStuttgart-VISUS/megamol,UniStuttgart-VISUS/megamol,UniStuttgart-VISUS/megamol