[3D] add support for stereomode detection of other codecs than MKV (for now asf/wmv)
[3D] fix resolution and aspect of stereoscopic videos in streamdetails
[3D] move fallback detection of stereoscopic mode from thumbloader to DVDFileInfo so that info is already correct in streamDetails
[3D] remove obsolete stereomode detection calls and rely on streamdetails
fixup aspect/res ?