Fixed rotation support in IE7

The already merged fix for #44 breaks support for IE7 and I was unable to get the original modernizr code that seems to be the base as there are no ie filter check (there is a css filter check but is for new CSS3 filter support), so I included the transform check, so if there is no transform support then we use the old ie filter.
Merge pull request #51 from frisco82/patch-1

Fixed rotation support in IE7. Think that if transform is not availible, it's ie with filters.